Fwiw, Pooley's vol 8 = Pooleys Q&A book.
Also, "Trevor Thom" books oft quoted are the forerunners of Pooleys Air Pilot Manual.
The PPL confuser book seems to have morphed into the Great Circle apps, together with the same errors.
Main problem with the Great Circle apps is that they have a habit of crashing which is frustrating, but the content is spookily close to the real thing.
Cheers, Howard