Mind over Mood is an excellent self guided CBT book. It comes with works sheets. There's also a practitioners version if you want to see how the sausage is mad

Mind over Mood is an excellent self guided CBT book. It comes with works sheets. There's also a practitioners version if you want to see how the sausage is made from a fascilitation side of thing. If you're interested in more advanced discussion of methods consider Judith Beck (late CBT creator Aaron Beck's daughter). CBT basics and beyond. Both are very popular within the UK.