I highly recommend the following guides for climbing in the Sierra, or anywhere in the world:
· Kathy
Cosley and Mark Houston.
· The Sierra Mountain Center (SP
Parker).
For anyone who wishes to visit the Cordilleras Blanca and Huayhuash I strongly recommend the services of Emilio Alvarado Fabián and his son Peter
· RockList.
· Climbnet.
· Pinnacles .
· Everest trek.
· 1997 Jannu North Face Expedition..
· Maps and Books .