I've probably read both HOH volumes 3 times thru by now, TOP twice and TPFAP twice. Other books that I've read haven't had as much influence so I haven't re-read them but could probably stand to in some cases. This is within about an 8 month period. Every subsequent time rereading a book I've found that I absorbed the material a lot more. If you have been considering it, take a little time and do it. I feel it had great value for me and would recommend it to anyone else that is a serious "learning" player.