Oxygen

Oxygen is written at a Level 4-5 reading level across 368 pages (approximately 119,346 words). Strong independent readers around grade 5.2 can typically handle this book on their own; with parent or teacher support, Oxygen works for readers up to grade 6.2.

Read aloud, Oxygen runs about 13.3 hours — long enough to span several bedtime sessions.

We rate Oxygen as 9IN ("Intense — Neutral") because the content sits in the "Intense" range — intense conflict including peril, frightening scenes, or emotionally heavy themes. The strongest signals come from emotional weight, physical peril, social complexity, thematic difficulty — these are the dimensions parents should evaluate against their reader's tolerance.

Specific content flags noted by reviewers: Animals are Abused, Animal Dies, Dead Animal, Gaslighting, Struggles to Breathe, Jump Scares, Spitting, Needles/Syringes, Hospital Scene, Claustrophobic Scene.

Thematically, Oxygen explores women astronauts, space flight, adventure, mystery, and science & nature — these threads give the book room to mean different things to different readers.