It’s funny. Everyone here took your question to mean that you wanted to learn in order to become a practitioner. I took it to mean you wanted to learn so you could help yourself.
My recommendation is that if you want to use it for yourself, don’t learn it from a book. Find someone—preferably a therapist—to treat you using those techniques.
I made a big mistake in trying to learn it from a book—“Feeling Good,” as it happens. Rather than empowering me, it made me feel much worse. It provided tools and yet, when I applied them, they didn’t work, and I blamed myself for them not working, and that sent down further, and the more I tried, the more I failed.
My therapist had recommended the book, and when I told her what was happening, she said I could throw it away. If that didn’t work, we’d find something that would work. I think that was the single most helpful thing she ever told me. It made me realize, in one swell foop, that it wasn’t my problem. It was just that we had the wrong tool.
We turned to mindfulness (I think it’s known as Dialectical Behavioral Therapy or DBT), which turned out to be more more my style. Rather than being responsible for my recovery, mindfulness allowed me to give up. It told me that I couldn’t stop the feelings. On the other hand, I didn’t have to give them much credit, either.
That worked for me. Like CBT, DBT is evidence-based therapy. Both have undergone study at prestigious Psychology schools, and have been proven effective. Both are potential tools in the psychological health tool kit. I don’t see why one wouldn’t be able to use both. I know a number of people who have had that kind of therapy and found it helpful. I know one person who is actively using it now, and she swears by it.
My perception is that CBT works better for people who aren’t all that self-aware. It destroy people who analyze more. DBT is better for the more philosophical types.
Anyway, if you want to learn CBT, one of the best places you can go is the Psychology Department at the University of Pennsylvania—the place where the therapy was developed and researched. Lots of serious, well-known people in CBT do research there.