There is also a new book by Steve (Stephen) Howard http://www.bookdepository.co.uk/book/9781844256389/Saxophone-Manual it is only about saxophones, but aimed more for a beginner who might later advance with the Thorp book. It can be a little annoying if you are only interested in clarinets since it is ony about saxophones and refers to the specific keys of sax. But as far as how to do those things yourself etc. it is perfect for a beginner and also explains the principals. Hard to say whether I'd recommend it for clarinets only. It's the nicest looking one with lots of colour photos, etc.