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Books by Franklin W. Dixon

7 books by Franklin W. Dixon have full reviews here; all 152 Franklin W. Dixon titles and editions in our catalog are rated for reading level and content intensity.

Franklin W. Dixon has 7 books with full reviews on HootRated, spanning Grade 4–5 reading level. The typical Franklin W. Dixon book lands at Grade 5, with average content intensity 2.3/5. Franklin W. Dixon's books span 2 series, including Hardy Boys Casefiles, Hardy Boys Secret Files.

Reading level alone doesn't tell parents whether a Franklin W. Dixon book is right for a child. 71% of Franklin W. Dixon's reviewed titles are at Gentle or Mild intensity — appropriate for sensitive readers or kids reading ahead of their emotional readiness. 14% 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.

A Killing in the Market (Hardy Boys Casefiles, # 18)

Franklin W. Dixon

Cover of A Killing in the Market (Hardy Boys Casefiles, # 18)

A Killing in the Market (Hardy Boys Casefiles, # 18)

Franklin W. Dixon

Level 4-5 Moderate

The Crowning Terror

Franklin W. Dixon

Cover of The Crowning Terror

The Crowning Terror

Franklin W. Dixon

Level 4-5 Mild

Cold Sweat

Franklin W. Dixon

Cover of Cold Sweat

Cold Sweat

Franklin W. Dixon

Level 4-5 Intense

The Genius Thieves (The Hardy Boys Casefiles #9)

Franklin W. Dixon

Cover of The Genius Thieves (The Hardy Boys Casefiles #9)

The Genius Thieves (The Hardy Boys Casefiles #9)

Franklin W. Dixon

Level 4-5 Mild

The Great Airport Mystery

Franklin W. Dixon

Cover of The Great Airport Mystery

The Great Airport Mystery

Franklin W. Dixon

Level 4-5 Mild

The Short-Wave Mystery

Franklin W. Dixon

Cover of The Short-Wave Mystery

The Short-Wave Mystery

Franklin W. Dixon

Level 4-5 Mild

Camping Chaos

Franklin W. Dixon

Cover of Camping Chaos

Camping Chaos

Franklin W. Dixon

Level 4-5 Gentle

More Franklin W. Dixon titles in our catalog

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

  • A Monster of a Mystery Level 3 · Gentle
  • A Skateboard Cat-astrophe Level 1-2 · Mild
  • Acting Up Level 4-5 · Mild
  • All Eyes On First Prize Level 3 · Mild
  • Attack of the Bayport Beast Level 4-5 · Mild
  • Attack of the Video Villians (Hardy Boys (Turtleback)) Level 4-5 · Mild
  • Cave Trap Level 4-5 · Mild
  • Choke Hold Level 4-5 · Mild
  • Competitive edge Level 4-5 · Moderate
  • Crime in the Cards (Hardy Boys (Turtleback)) Level 4-5 · Mild
  • Crime in the kennel Level 4-5 · Mild
  • Danger Unlimited #79 Level 4-5 · Mild
  • Danger Zone Level 4-5 · Moderate
  • Daredevils Level 4-5 · Mild
  • Dead in the water Level 4-5 · Moderate
  • Dead Man in Deadwood Level 4-5 · Mild
  • Dead on Target (Hardy Boys Casefiles #1) Level 4-5 · Moderate
  • Dead on Target/The Genius Thieves/The Perfect Getaway/The Borgia Dagger/Blood Relations (The Hardy Boys Casefiles 1, 9, 12-13 & 15) Level 8 · Moderate
  • DEAD SEASON (HARDY BOYS CASE FILE 35): DEAD SEASON Level 4-5 · Mild
  • DEADLIEST DARE (HARDY BOYS CASE FILE 30): DEADLIEST DARE Level 4-5 · Mild
  • DEMONS DEN HB81 Level 6 · Moderate
  • Desert Thieves Level 4-5 · Mild
  • Double Deception Level 4-5 · Moderate
  • Double Down Level 4-5 · Moderate
  • Double Exposure (Hardy Boys Casefiles, Case 22) Level 4-5 · Moderate
  • Double Trouble Level 4-5 · Mild
  • Feeding Frenzy Level 4-5 · Mild
  • Final Gambit Level 4-5 · Mild
  • Footprints Under the Window (Hardy Boys, Book 12) Level 6 · Mild
  • Fright Wave (Hardy Boys Casefiles, No. 40) (Hardy Boys Casefiles) Level 4-5 · Moderate
  • Gray Hunter's Revenge Level 4-5 · Mild
  • Hardy Boys (The Hardy Boys) Level 4-5 · Mild
  • Hardy Boys Adventures 3-Books-In-1! Level 8 · Mild
  • Hardy Boys Case Files No 1 (1-7) Level 8 · Mild
  • Hardy Boys Casefiles #01-5 Vol. Boxed-Set Level 4-5 · Moderate
  • Hardy Boys Casefiles #02; 41-46 and Supermystery Level 5 · Mild
  • Hardy Boys Casefiles 74 — Road Pirates Level 4-5 · Mild
  • Hardy Boys Casefiles Boxed Set Level 8 · Mild
  • Hardy Boys starter set (Hardy Boys) Level 4-5 · Mild
  • Hardy Boys, Box Set 2 Level 6 · Mild
  • Hide and Sneak Level 2 · Moderate
  • HOSTAGES OF HATE (HB #10) Level 4-5 · Moderate
  • Hurricane Joe Level 4-5 · Mild
  • In Plane Sight Level 4-5 · Mild
  • In Self-Defense Level 4-5 · Mild
  • Jump Shot Detectives (Frank and Joe Hardy: The Clues Brothers #4) Level 4-5 · Mild
  • Killer Mission Level 4-5 · Mild
  • LAST LAUGH (HARDY BOYS CASE FILE 42): LAST LAUGH Level 2 · Mild
  • Law of the Jungle (The Hardy Boys Casefiles #105) Level 4-5 · Mild
  • Lethal Cargo Level 4-5 · Mild
  • Lights, camera ... zombies! Level 3 · Mild
  • Line of Fire Level 4-5 · Moderate
  • London Deception Level 4-5 · Mild
  • Martial Law Level 4-5 · Mild
  • Missing Chums Level 4-5 · Mild
  • Moment of Truth Level 4-5 · Mild
  • Mystery of the Phantom Heist Level 4-5 · Moderate
  • Mystery on the Mayhem Express Level 4-5 · Mild
  • MYSTERY SMUGGLERS COVE (HARDY BOYS 64): MYSTERY SMUGGLERS COVE Level 4-5 · Mild
  • Night of the werewolf Level 4-5 · Mild
  • One False Step Level 4-5 · Mild
  • Operation: Survival Level 4-5 · Mild
  • Passport to Danger Level 4-5 · Mild
  • Past And Present Danger Level 4-5 · Mild
  • Peril at Granite Peak Level 4-5 · Mild
  • Poisoned Paradise Level 4-5 · Mild
  • Power Play Level 4-5 · Mild
  • Return to Black Bear Mountain Level 4-5 · Mild
  • Robot Rescue! Level 3 · Mild
  • Rock ‘N’ Revenge Level 2 · Mild
  • Rocky Road (Hardy Boys: All New Undercover Brothers #5) Level 4-5 · Mild
  • Running on Fumes (Hardy Boys: Undercover Brothers) Level 4-5 · Moderate
  • Scavenger hunt heist Level 1-2 · Mild
  • Secret of Skeleton Reef Level 4-5 · Mild
  • Sheer Terror Level 4-5 · Mild
  • Sidetracked to Danger Level 4-5 · Mild
  • Sky High Level 4-5 · Mild
  • Survival Run Level 4-5 · Moderate
  • The Blackwing puzzle Level 6 · Mild
  • The Borgia Dagger (Hardy Boys Casefiles #13) Level 4-5 · Mild
  • The Castle Conundrum Level 4-5 · Mild
  • The Chase for the Mystery Twister Level 4-5 · Mild
  • The crisscross shadow Level 4-5 · Mild
  • The Dangerous Transmission Level 4-5 · Mild
  • The Desert Thieves Level 4-5 · Mild 2 editions
  • The Emperor’s Shield Level 4-5 · Mild
  • The Four-Headed Dragon Level 4-5 · Moderate
  • The Ghost at Skeleton Rock Level 4-5 · Mild
  • The Hardy Boys Level 4-5 · Mild 3 editions
  • The Hardy Boys Casefiles #112 Level 4-5 · Mild
  • The Hardy Boys Casefiles No. 32 Level 4-5 · Moderate
  • The Hardy Boys Casefiles No. 33 Level 4-5 · Mild
  • The Hardy Boys Casefiles No. 5 Level 4-5 · Moderate
  • The Hardy Boys Digest-4 Vol. Boxed-Set Level 4-5 · Mild
  • The hooded hawk mystery Level 4-5 · Moderate
  • The Hunt for the Four Brothers Level 4-5 · Mild
  • The Hypersonic Secret Level 4-5 · Mild
  • The ice-cold case Level 4-5 · Moderate
  • The KARATE CLUE FRANK AND JOE HARDY THE CLUES BROTHERS 2 (Frank and Joe Hardy, the Clues Brothers) Level 3 · Mild
  • The Mark on the Door (Hardy Boys, Book 13) Level 6 · Mild
  • The Missing Mitt Level 3 · Gentle
  • The Mummy Case Level 4-5 · Mild
  • The Mystery of the Spiral Bridge Level 4-5 · Moderate
  • The Night of the Werewolf Level 4-5 · Mild
  • The Pentagon Spy Level 4-5 · Mild
  • The Phantom Freighter Level 4-5 · Moderate
  • The Race Is On Level 3 · Mild
  • The Roaring River Mystery Level 4-5 · Mild
  • The secret of the old mill Level 6 · Mild
  • The Secret of the Soldier's Gold Level 4-5 · Mild
  • The Secret Warning (Hardy Boys, Book 17) Level 6 · Mild
  • The Shadow Killers Level 4-5 · Mild
  • The Sinister Signpost (Hardy Boys, Book 15) Level 6 · Mild
  • The Smoke Screen Mystery Level 4-5 · Mild
  • The Sting of the Scorpion Level 4-5 · Mild
  • The SWAMP MONSTER HARDY BOYS #83 Level 4-5 · Mild
  • The Test Case Level 4-5 · Gentle
  • The Test Case (The Hardy Boys #171) Level 4-5 · Gentle
  • The Time Warp Wonder Level 3 · Gentle
  • The Trouble in Warp Space Level 4-5 · Mild
  • The Viking Symbol Mystery Level 4-5 · Mild
  • The Witchmaster's Key Level 4-5 · Mild
  • THICK AS THIEVES (HARDY BOYS CASE FILE 29): THICK AS THIEVES Level 4-5 · Moderate
  • Three-Ring Terror Level 4-5 · Mild
  • Too Many Traitors (Hardy Boys Casefiles, Case 14) Level 4-5 · Moderate
  • Track of the Zombie (The Hardy Boys #71) Level 4-5 · Mild
  • Training for trouble Level 4-5 · Mild
  • Trapped at Sea (The Hardy Boys #75) Level 4-5 · Mild
  • Treacherous Tide Level 4-5 · Mild
  • Trick-or-Trouble Level 4-5 · Mild
  • Tricks of the Trade (Hardy Boys (Turtleback)) Level 4-5 · Mild
  • Trouble at Coyote Canyon Level 4-5 · Mild
  • Trouble at the Arcade Level 3 · Gentle
  • Undercover Bookworms Level 4-5 · Mild
  • VOODOO PLOT (HARDY BOYS 72): VOODOO PLOT Level 4-5 · Mild
  • Warehouse Rumble Level 4-5 · Mild
  • Water-Ski Wipeout Level 3 · Gentle
  • Who Took the Book? Level 3 · Mild
  • Wild Wheels Level 4-5 · Mild
  • WITHOUT A TRACE Level 4-5 · Mild
  • Wrong Side of the Law Level 4-5 · Mild

Questions about Franklin W. Dixon's books

What reading level are Franklin W. Dixon's books?
Franklin W. Dixon's reviewed books range from Grade 4–5, 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 Franklin W. Dixon's books appropriate for sensitive readers?
5 of Franklin W. Dixon's 7 reviewed books (71%) are at Gentle or Mild intensity — safe for sensitive readers. 1 (14%) is rated Intense or Very Intense. Average intensity: 2.3/5.
What age are Franklin W. Dixon's books appropriate for?
Franklin W. Dixon's reviewed books target Ages 5-8 and Ages 9-12 and Ages 11+ and Ages 13+. HootRated rates each book on reading level and content intensity — match both dimensions, not just one.