Books

I am beginning to enter books and web sites that I and clients have found to be fascinating, and helpful.  Since there are so many great books and web sites, I cannot read them all, so if a client has read a book and they found it be be a good book for them, I will then recommend it to others.  Have you found a book or a website that was life-changing or helpful for you?  If so, what is it and what made it helpful?  Would it be good for anybody, or a certain age group, gender, or belief system? If you have a good book or site, feel free to post it and tell me why.  Please, no trying to sell your own book or website – that will be deleted.