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Tunnel in the Sky
Heinlein, Robert A
Buy on Amazon
Kindle
science fiction
hard science fiction/survival fiction
past tense
third limited POV
~298 pp
high worldbuilding
features extracted
2026-04-12
Vibe
survival
adventure
community
A propulsive science fiction. Expect rich worldbuilding, epic scope. Contains notable violence.
Style Fingerprint
Prose density
45
sparse
dense
Pacing
75
slow burn
propulsive
Emotional tone
30
dark
hopeful
Worldbuilding
85
minimal
maximal
Char / plot
60
character-driven
plot-driven
Interiority
40
external
introspective
Ending
60
unresolved
cathartic
Stakes
80
intimate
epic
Content
Violence
80%
none
extreme
Sexual content
10%
none
explicit
Humor
40%
serious
comedic
Romance
30%
none
central
Speculative hardness
soft/vibes → hard sci-fi / rigorous magic
Structure & Cast
Structure
Word count
74,501
Page count
~298 pp
Prologue
—
Epilogue
—
Tense
past
Cast & World
POV
third limited
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