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Books by Susan Heinrichs Gray

61 books by Susan Heinrichs Gray have full reviews here; all 127 Susan Heinrichs Gray titles and editions in our catalog are rated for reading level and content intensity.

Susan Heinrichs Gray has 61 books with full reviews on HootRated, spanning Grade 1–6 reading level. The typical Susan Heinrichs Gray book lands at Grade 5, with average content intensity 1.1/5. Susan Heinrichs Gray's books span 25 series, including True Book; True Book: Geography-Countries, First Reports, Let's See - Our Nation, and 22 more.

Reading level alone doesn't tell parents whether a Susan Heinrichs Gray book is right for a child. 98% of Susan Heinrichs Gray's reviewed titles are at Gentle or Mild intensity — appropriate for sensitive readers or kids reading ahead of their emotional readiness. 2% are rated Intense or Very Intense. The intensity badges below (green → red) help you match books to your child's emotional readiness, not just their reading ability. See our methodology for how we rate.

Germany

Susan Heinrichs Gray

Cover of Germany

Germany

Susan Heinrichs Gray

Level 4-5 Gentle

Deserts (First Reports)

Susan Heinrichs Gray

Cover of Deserts (First Reports)

Deserts (First Reports)

Susan Heinrichs Gray

Level 4-5 Gentle

Grasslands (First Reports)

Susan Heinrichs Gray

Cover of Grasslands (First Reports)

Grasslands (First Reports)

Susan Heinrichs Gray

Level 4-5 Gentle

Russia

Susan Heinrichs Gray

Cover of Russia

Russia

Susan Heinrichs Gray

Level 3-4 Gentle

The American Flag (Let's See Library)

Susan Heinrichs Gray

Cover of The American Flag (Let's See Library)

The American Flag (Let's See Library)

Susan Heinrichs Gray

Level 3-4 Gentle

The White House

Susan Heinrichs Gray

Cover of The White House

The White House

Susan Heinrichs Gray

Level 2-3 Gentle

Living With Cerebral Palsy (Living Well Chronic Conditions)

Susan Heinrichs Gray

Cover of Living With Cerebral Palsy (Living Well Chronic Conditions)

Living With Cerebral Palsy (Living Well Chronic Conditions)

Susan Heinrichs Gray

Level 4-5 Gentle

Living With Cystic Fibrosis (Living Well Chronic Conditions)

Susan Heinrichs Gray

Cover of Living With Cystic Fibrosis (Living Well Chronic Conditions)

Living With Cystic Fibrosis (Living Well Chronic Conditions)

Susan Heinrichs Gray

Level 4-5 Mild

The Digestive System (Body Systems)

Susan Heinrichs Gray

Cover of The Digestive System (Body Systems)

The Digestive System (Body Systems)

Susan Heinrichs Gray

Level 4-5 Gentle

The Nervous System (Body Systems)

Susan Heinrichs Gray

Cover of The Nervous System (Body Systems)

The Nervous System (Body Systems)

Susan Heinrichs Gray

Level 4-5 Gentle

Ankylosaurus (Science of Dinosaurs)

Susan Heinrichs Gray

Cover of Ankylosaurus (Science of Dinosaurs)

Ankylosaurus (Science of Dinosaurs)

Susan Heinrichs Gray

Level 5-6 Gentle

Apatosaurus (Science of Dinosaurs)

Susan Heinrichs Gray

Cover of Apatosaurus (Science of Dinosaurs)

Apatosaurus (Science of Dinosaurs)

Susan Heinrichs Gray

Level 5-6 Gentle

Stegosaurus (Science of Dinosaurs)

Susan Heinrichs Gray

Cover of Stegosaurus (Science of Dinosaurs)

Stegosaurus (Science of Dinosaurs)

Susan Heinrichs Gray

Level 5-6 Gentle

Triceratops (Science of Dinosaurs)

Susan Heinrichs Gray

Cover of Triceratops (Science of Dinosaurs)

Triceratops (Science of Dinosaurs)

Susan Heinrichs Gray

Level 5 Gentle

Tyrannosaurus Rex (Science of Dinosaurs)

Susan Heinrichs Gray

Cover of Tyrannosaurus Rex (Science of Dinosaurs)

Tyrannosaurus Rex (Science of Dinosaurs)

Susan Heinrichs Gray

Level 5-6 Gentle

Allosaurus (Exploring Dinosaurs)

Susan Heinrichs Gray

Cover of Allosaurus (Exploring Dinosaurs)

Allosaurus (Exploring Dinosaurs)

Susan Heinrichs Gray

Level 5-6 Gentle

Iguanodon (Exploring Dinosaurs)

Susan Heinrichs Gray

Cover of Iguanodon (Exploring Dinosaurs)

Iguanodon (Exploring Dinosaurs)

Susan Heinrichs Gray

Level 4-5 Gentle

Oviraptor

Susan Heinrichs Gray

Cover of Oviraptor

Oviraptor

Susan Heinrichs Gray

Level 4-5 Gentle

Compsognathus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Cover of Compsognathus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Compsognathus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Level 5-6 Gentle

Spinosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Cover of Spinosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Spinosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Level 5-6 Gentle

Edmontosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Cover of Edmontosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Edmontosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Level 5-6 Gentle

Megalosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Cover of Megalosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Megalosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Level 5-6 Gentle

Psittacosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Cover of Psittacosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Psittacosaurus (Gray, Susan Heinrichs. Exploring Dinosaurs.)

Susan Heinrichs Gray

Level 5 Gentle

Dinosaur Armor

Susan Heinrichs Gray

Cover of Dinosaur Armor

Dinosaur Armor

Susan Heinrichs Gray

Level 2-3 Gentle

Dinosaur Eggs

Susan Heinrichs Gray

Cover of Dinosaur Eggs

Dinosaur Eggs

Susan Heinrichs Gray

Level 3-4 Gentle

Animals Helping to Detect Diseases

Susan Heinrichs Gray

Cover of Animals Helping to Detect Diseases

Animals Helping to Detect Diseases

Susan Heinrichs Gray

Level 4-5 Gentle

Paleontology the study of prehistoric life

Susan Heinrichs Gray

Cover of Paleontology the study of prehistoric life

Paleontology the study of prehistoric life

Susan Heinrichs Gray

Level 6 Gentle

Chimpanzee Babies

Susan Heinrichs Gray

Cover of Chimpanzee Babies

Chimpanzee Babies

Susan Heinrichs Gray

Level 2 Gentle

Hippopotamus Calves

Susan Heinrichs Gray

Cover of Hippopotamus Calves

Hippopotamus Calves

Susan Heinrichs Gray

Level 2 Gentle

Jaguar Cubs

Susan Heinrichs Gray

Cover of Jaguar Cubs

Jaguar Cubs

Susan Heinrichs Gray

Level 2 Gentle

Koala Bear Joeys

Susan Heinrichs Gray

Cover of Koala Bear Joeys

Koala Bear Joeys

Susan Heinrichs Gray

Level 1-2 Gentle

Caribou Migration

Susan Heinrichs Gray

Cover of Caribou Migration

Caribou Migration

Susan Heinrichs Gray

Level 3-4 Gentle

Burmese Pythons Invade the Everglades

Susan Heinrichs Gray

Cover of Burmese Pythons Invade the Everglades

Burmese Pythons Invade the Everglades

Susan Heinrichs Gray

Level 3-4 Gentle

Northern Snakeheads Invade Ponds and Watersheds

Susan Heinrichs Gray

Cover of Northern Snakeheads Invade Ponds and Watersheds

Northern Snakeheads Invade Ponds and Watersheds

Susan Heinrichs Gray

Level 3-4 Gentle

American Minks Invade the United Kingdom

Susan Heinrichs Gray

Cover of American Minks Invade the United Kingdom

American Minks Invade the United Kingdom

Susan Heinrichs Gray

Level 3-4 Gentle

Chihuahuas (Domestic Dogs)

Susan Heinrichs Gray

Cover of Chihuahuas (Domestic Dogs)

Chihuahuas (Domestic Dogs)

Susan Heinrichs Gray

Level 2-3 Gentle

Shih Tzus (Domestic Dogs)

Susan Heinrichs Gray

Cover of Shih Tzus (Domestic Dogs)

Shih Tzus (Domestic Dogs)

Susan Heinrichs Gray

Level 2-3 Gentle

Beagles (Domestic Dogs)

Susan Heinrichs Gray

Cover of Beagles (Domestic Dogs)

Beagles (Domestic Dogs)

Susan Heinrichs Gray

Level 3 Gentle

Cocker Spaniels (Domestic Dogs)

Susan Heinrichs Gray

Cover of Cocker Spaniels (Domestic Dogs)

Cocker Spaniels (Domestic Dogs)

Susan Heinrichs Gray

Level 3 Gentle

Dachshunds (Domestic Dogs)

Susan Heinrichs Gray

Cover of Dachshunds (Domestic Dogs)

Dachshunds (Domestic Dogs)

Susan Heinrichs Gray

Level 3-4 Gentle

Pomeranians (Domestic Dogs)

Susan Heinrichs Gray

Cover of Pomeranians (Domestic Dogs)

Pomeranians (Domestic Dogs)

Susan Heinrichs Gray

Level 3 Gentle

Rottweilers (Domestic Dogs)

Susan Heinrichs Gray

Cover of Rottweilers (Domestic Dogs)

Rottweilers (Domestic Dogs)

Susan Heinrichs Gray

Level 3-4 Gentle

Scottish Terriers (Domestic Dogs)

Susan Heinrichs Gray

Cover of Scottish Terriers (Domestic Dogs)

Scottish Terriers (Domestic Dogs)

Susan Heinrichs Gray

Level 3-4 Gentle

American Alligator (Road to Recovery)

Susan Heinrichs Gray

Cover of American Alligator (Road to Recovery)

American Alligator (Road to Recovery)

Susan Heinrichs Gray

Level 5 Gentle

Gray Whale (Road to Recovery)

Susan Heinrichs Gray

Cover of Gray Whale (Road to Recovery)

Gray Whale (Road to Recovery)

Susan Heinrichs Gray

Level 4-5 Mild

Gray Bat (Road to Recovery)

Susan Heinrichs Gray

Cover of Gray Bat (Road to Recovery)

Gray Bat (Road to Recovery)

Susan Heinrichs Gray

Level 4-5 Gentle

Elephant Seal (Road to Recovery)

Susan Heinrichs Gray

Cover of Elephant Seal (Road to Recovery)

Elephant Seal (Road to Recovery)

Susan Heinrichs Gray

Level 5 Gentle

Key Deer

Susan Heinrichs Gray

Cover of Key Deer

Key Deer

Susan Heinrichs Gray

Level 5-6 Gentle

Karner Blue Butterfly (Road to Recovery)

Susan Heinrichs Gray

Cover of Karner Blue Butterfly (Road to Recovery)

Karner Blue Butterfly (Road to Recovery)

Susan Heinrichs Gray

Level 4-5 Gentle

Mongolian Wild Horse (Road to Recovery)

Susan Heinrichs Gray

Cover of Mongolian Wild Horse (Road to Recovery)

Mongolian Wild Horse (Road to Recovery)

Susan Heinrichs Gray

Level 4-5 Gentle

Emerald Ash Borer (Animal Invaders)

Susan Heinrichs Gray

Cover of Emerald Ash Borer (Animal Invaders)

Emerald Ash Borer (Animal Invaders)

Susan Heinrichs Gray

Level 5-6 Gentle

Starling (Animal Invaders)

Susan Heinrichs Gray

Cover of Starling (Animal Invaders)

Starling (Animal Invaders)

Susan Heinrichs Gray

Level 4-5 Gentle

Disease control

Susan Heinrichs Gray

Cover of Disease control

Disease control

Susan Heinrichs Gray

Level 5-6 Gentle

Emergency care

Susan Heinrichs Gray

Cover of Emergency care

Emergency care

Susan Heinrichs Gray

Level 5-6 Gentle

Bullfrog

Susan Heinrichs Gray

Cover of Bullfrog

Bullfrog

Susan Heinrichs Gray

Level 5-6 Gentle

Jellyfish

Susan Heinrichs Gray

Cover of Jellyfish

Jellyfish

Susan Heinrichs Gray

Level 4-5 Intense

The circulatory system

Susan Heinrichs Gray

Cover of The circulatory system

The circulatory system

Susan Heinrichs Gray

Level 4-5 Gentle

The skeletal system

Susan Heinrichs Gray

Cover of The skeletal system

The skeletal system

Susan Heinrichs Gray

Level 4-5 Gentle

Hornbill

Susan Heinrichs Gray

Cover of Hornbill

Hornbill

Susan Heinrichs Gray

Level 4-5 Gentle

Storm chaser

Susan Heinrichs Gray

Cover of Storm chaser

Storm chaser

Susan Heinrichs Gray

Level 5-6 Mild

Grasshopper

Susan Heinrichs Gray

Cover of Grasshopper

Grasshopper

Susan Heinrichs Gray

Level 2-3 Gentle

More Susan Heinrichs Gray titles in our catalog

Each is rated too; choosing one opens it in search.

  • Allosaurus Level 5-6 · Gentle
  • American Bullfrogs Invade Swamps and Ponds Level 2 · Gentle
  • Ankylosaurus Level 5-6 · Gentle
  • Apatosaurus Level 5-6 · Gentle
  • Bats Sleep Upside Down Level 3-4 · Gentle 2 editions
  • Cocker Spaniels Level 3 · Gentle
  • Compsognathus Level 5-6 · Gentle
  • Dolphins breathe air Level 3-4 · Gentle
  • Emperor Penguin Migration Level 3-4 · Gentle 2 editions
  • Experiments with electricity Level 5-6 · Gentle
  • Experiments with motion Level 2 · Gentle
  • Food webs Level 7 · Gentle
  • Forensic Psychologist Level 6-7 · Gentle
  • Giant African snail Level 5-6 · Gentle
  • Golden Retrievers (Domestic Dogs) Level 2 · Gentle
  • Harpy eagle Level 4-5 · Gentle
  • Hearing Level 5-6 · Gentle
  • Humpback Whale Migration Level 3-4 · Gentle
  • Iguanodon Level 4-5 · Gentle
  • Junior scientists Level 2 · Gentle
  • Labradors (Domestic Dogs) Level 2 · Gentle
  • Lionfish Level 4-5 · Gentle
  • Maiasaura Level 3-4 · Gentle 2 editions
  • Maiasaura (Exploring Dinosaurs) Level 3-4 · Gentle
  • Penguins can't fly Level 3-4 · Gentle
  • Polar Bear Cubs Level 2 · Gentle
  • Pomeranians Level 3 · Gentle
  • Pterosaurs (Exploring Dinosaurs & Prehistoric Creatures) Level 2 · Gentle
  • Rottweilers Level 3-4 · Gentle
  • Ruby-Throated Hummingbird Migration Level 3-4 · Gentle 2 editions
  • Seeds Level 2 · Gentle
  • Skunks smell bad Level 3-4 · Gentle
  • Snakes Shed Their Skin Level 3-4 · Gentle
  • Spinosaurus Level 5-6 · Gentle
  • Stegosaurus Level 5-6 · Gentle
  • Super cool science experiments Level 2 · Gentle
  • Termite Level 5-6 · Gentle
  • The Circulatory System (Body Systems) Level 4-5 · Gentle
  • The life cycle of insects Level 5-6 · Gentle
  • The Muscular System (Body Systems) Level 2 · Gentle
  • Transplants Level 5-6 · Gentle
  • Triceratops Level 5 · Gentle
  • Tyrannosaurus Rex Level 5-6 · Gentle 2 editions
  • Velociraptor Level 3-4 · Gentle
  • Velociraptor (Science of Dinosaurs) Level 3-4 · Gentle
  • Walking catfish Level 5-6 · Gentle
  • Whooping Crane (Road to Recovery) Level 2 · Mild
  • Wildebeest Migration Level 3-4 · Gentle
  • Yorkshire Terriers Level 2 · Gentle
  • Yorkshire Terriers (Domestic Dogs) Level 2 · Gentle
  • Zebras have stripes Level 3-4 · Gentle

Questions about Susan Heinrichs Gray's books

What reading level are Susan Heinrichs Gray's books?
Susan Heinrichs Gray's reviewed books range from Grade 1–6, with the typical book at Grade 5. Each title has a separate content intensity score so parents can choose by emotional readiness, not just text difficulty.
Are Susan Heinrichs Gray's books appropriate for sensitive readers?
60 of Susan Heinrichs Gray's 61 reviewed books (98%) are at Gentle or Mild intensity — safe for sensitive readers. 1 (2%) is rated Intense or Very Intense. Average intensity: 1.1/5.
What age are Susan Heinrichs Gray's books appropriate for?
Susan Heinrichs Gray's reviewed books target Ages 5-8 and Ages 9-12. HootRated rates each book on reading level and content intensity — match both dimensions, not just one.