Trekking in Nepal: A Traveler's Guide, by Stephen Bezruchka, has cross-cultural
suggestions and detailed information about how to organise a
backpacking or lodge trek. There are many route descriptions that
include walking times.
Travelers Tales - Nepal, Stories and anecdotes by those who have lived in and visited Nepal, including Jimmy Carter, Jeff Greenwald and Broughton Coburn.
The Seven Mountain Travel Books published by the Seattle
Mountaineers, which contains Nepal Himalaya by H W Tilman.
It's a delightful book filled with Tilman's dry wit and describes the
first treks in Nepal in 1949 and 1950.
Escape from Kathmandu by Kim Stanley Robinson is an
off-the- wall romp around Nepal. There's an effort to free a captured
yeti, an illegal ascent of Everest with a reincarnate lama and an
encounter with Jimmy Carter.
The Ascent of Rum Doodle, by W E Bowman, is the classic spoof of
mountaineering books. It's a good diversion after reading a few
expedition accounts that take themselves too seriously.
Nepal Phrasebook, by Mary-Jo O'Rourke and Bimal Man
Shrestha is a handy phrasebook with a good section on trekking.
Tibetan Phrasebook, by Sandup Tsering is useful to
have along in Mustang, Dolpo and on the trek to Mt Kailas.
Nepali for Trekkers, by Stephen Bezruchka, is a Nepali
phrase book with a good tape.
Medicine
Medicine for Mountaineering & Other Wilderness
Activities, by James A Wilkerson, is an outstanding
reference book for the layperson. It describes many of the medical
problems typically encountered in Nepal. One copy of this book should
accompany every trekking party.