Good book recommendations for a novice rider

[Supertrooper]

I'm helping a friend learn to ride, she is a good rider with a already good position but she is a novice so along with my rather limited knowledge and her booking some lessons are there any books that could help her to explain position/aids etc

 

[Naggy]

Heather Moffett's Enlightened Equitation is excellent, but she does have a new book coming out soon which will be even better, so keep an eye out for that!

 

[Finn]

Susan McBane, 100 ways to improve you riding, Common faults and how to cure them.
You can get it of amazon.co.uk. Brill book for novices. Tells you everything you could possibly need to know about riding and all the correct ways to do it.