Malaria info from CIWEC clinic. Basically, risk is low for most people in Nepal.

CIA World Factbook: Nepal
US Consular travel warning for Nepal
US Embassy in Nepal
Nepal books
Trailblazer Guides
Trekking in the Annapurna Region
Bryn Thomas
ISBN 978-1-873756-68-3
4th edition
Nepal Travel Guide
ISBN: 1740596994
US $24.99
7th Edition / September 2006
Stan Armington et al
Nepali Phrasebook
US $7.99
4th Edition / December 2002
ISBN: 1740591925
Mary-Jo O'Rourke
Trekking in the Nepal Himalaya Guide
US $19.99
8th Edition / October 2001
ISBN: 1864502312
Stan Armington
http://www.yetizone.com/
YetiZone is your independent guidebook to Himalayan trekking in Nepal.
http://thorntree.lonelyplanet.com/messagepost.cfm?postaction=reply&catid...
You MUST take the high trail from Pisang to Ghyaru and Ngawal, NOT the valley floor trail 90% of trekkers use. Best views, best original Bhotia villages, advanced acclimatization (already higher than Manang).
The Trailblazer Guide (sorry LP) and a map purchased at any bookstore in Thamel, Kathmandu are all you need.
http://thorntree.lonelyplanet.com/messagepost.cfm?postaction=reply&catid...
bookstores in thamel.
There's a very good bookstore called Pilgrim's in Thamel. I saw another one the same street as Helena's , but can't remember its name. There are 2 bookshops that I can remember on the main lakeside street in Pokhara.