My T told me about his own book, but actually told me not to buy it because it was just the same stuff we talk about in session. I bought it anyway, and find it really helpful to have the words right in front of me whenever I need them. I told my T that and he said he was flattered.

As an aside, I have now purchased the book four times, but only possess one copy because I loaned it to friends and then they asked to keep it because they also found it helpful. So, I would buy a new one, and then loan it, and then ...