Any Non fiction book on a subject that you are interested in and have some foundation knowledge of is a great start.
The reason I strongly recommend not using books that you are studying for courses with is that there is an underlying emotional investment. You want to do well in the course. On a scale of 1 to 10 this probably has an importance factor of 8 for most people. Add to that photoreading. for which their emotional factor for learning, for the sake of learning might start at 6 but because of the need (in association to studying) this often bears the same importance as the course subject. You wind up with emotional overload that you have twice as much bagage to carry. It greatly hinders the learning of photoreading and the course subject learning.
The books that you learn with may be technical, however, not related to any of the courses you are studying (unless it's one you love and find a breeze anyway because you're doing it more for the fun of it).
Any non fiction book of 200 to 300 pages is excellent. The only 'rule' is that it something that you are curious about and removed from any other studying you're doing at the momment. This helps you to be able to notice how purpose, and a questioning mind delves into a book for activation. Once you 'see', feel, 'know' you've done it. It's easier to transfer. Give yourself the chance to recognise that you learnt the Photoreading system.
Alex
[This message has been edited by AlexK (edited October 27, 2003).]