Here are some books that are very useful for practice:
A wonderful easy to use guide for all postures including the level 2 curriculum. easy to follow instructions, clear sanskrit names of the postures, lovely photos….
Another great book by Mira Mehta. This book has very easy to follow practice plans, all within the Level 1 curriculum. There are also many therapeutic practices as well.
A wonderful lengthy guide with clear instruction and all the therapuetic practices you could ever need. Although this a long book, the more complete array of postures is in Mira Mehta’s “Yoga the Iyengar Way”.
B.K.S. Iyengar’s definitive guide on yoga asana from the 50′s. This earlier edition is smaller and easy to use than the newer publication. It will give you all the information you need on postures, however it is not as easy to use as a practice manual.
Here are some useful websites for Iyengar yoga:
http://www.iyengaryogacanada.ca/
official site of the Iyengar Yoga Association of Canada.
official site of B.K.S. Iyengar in India
Iyengar Yoga National Association of the United States