Samson
Great idea and I think the flute players, clarinet players, saxophone players, oboists, cellists etc would all like books like piano and violin.
Unfortunately there aren't enough people taking these exams to warrant the cost of producing books for each instrument. There are many piano and violin exams worldwide but not sufficient of anything else - although I guess it must be quite a close call on flute and clarinet these days.
I think most of us will find we have to stick with many books for one exam