Some of the below are "old" books now (anything from 10-50 years old probably) and I'm not sure how many are on Kindle, but I'd recommend the following:
1) SCIENCE FICTION
ARTHUR C CLARKE
- Childhood's End
- The City and the Stars
- Rendezvous with Rama (but not the "sequels")
ROBERT A HEINLEIN
- Starship Troopers
NEAL STEPHENSON
- Snow Crash
- The Diamond Age
LARRY NIVEN AND JERRY POURNELLE
- Footfall
- The Mote in Gods Eye
- Lucifer's Hammer
DAN SIMMONS
- Hyperion, Rise of Hyperion, Endymion, Rise of Endymion
E.E.DOC SMITH
- The Lensman series (except for Book 7, Master of the Vortex, which is junk and a tangent to the series)
GREG BEAR
- Eon
2) FANTASY
RAYMOND E FEIST
- Magician trilogy (Magician, Silverthorn, Darkness at Sethanon) - his stuff got worse and worse, but the first 3 books were excellent
JULIAN MAY
- Exiles Quadrilogy (The Many Coloured Land, The Golden Torc, The Nonborn King and The Adversary)
MARGARET WEIS AND TRACY HICKMAN
- Dragonlance Chronicles (Dragons of Autumn Twilight, Dragons of Winter Night, Dragons of Spring Dawning) - again, their stuff got bad quick but their first collaboration was fun.
3) BUSINESS/ECONOMICS
STEVEN D. LEVITT
- Freakonomics
- Superfreakonomics
DAN ARIELY
- Predictably Irrational
- The Upside of Irrationality
CHRIS ANDERSON
- Free
- The Long Tail
TIM FERRISS
- 4 hour work week
JASON YELOWITZ
- The Bathrobe Millionnaire
NOAH J. GOLDSTEIN
- Yes! 50 Secrets from the Science of Persuasion
4) OTHER FICTION/NON-FICTION
BILL BRYSON
- Neither Here nor There
- Notes from a Small Island
- The Lost Continent
STEVEN KING
- The Bachman Books
AYN RAND
- Atlas Shrugged