I've found these books can be the 'background music' to any good trip, the thing you're really into when you're not surfing, either lounging by the pool/at the beach, long haul flight, waiting for a mea or at immigrasi, etc.
For myself: Neal Stephenson's Cryptonomicon, Mark Galeotti's The Vory, Vernor Vinge's A Deepness in the Sky, and surprisingly Nicholas Eames' Kings of the Wyld.
Interested in establishing some criteria, other than ripping good yearn. Cheers!
