If I had to choose a handful of books as "great picks" (and what a tough ask that is) it'd be:
Sophies World by Jostein Gaarder
Hitch Hikers Guide to the Galaxy by Douglas Adams
A Brief History of Time by Stephen Hawking
The Discworld Novels by Terry Pratchett
Zen & The Art of Motorcycle Maintenance by R.Pirsig
What colour is your parachute?
Drawing on the Right Side of the Brain