Parcel has arrived! The Great Bass Practice Book is quite something, it is 181 pages and starts on page 1 with B and A. Page 2 if you want B, A and G! But the cover says it is beginner to approx grade 7, and I see plenty of Bach, Handel and Telemann as you go through. Probably do me some good to start nearer the beginning, but may well skip straight to a Telemann fantasia movement that I spotted which I know very well.