In reply to alexgoodey:
Any Aviation related meteorology book will give you everything you need in great detail, especially with regards to mountains......after all, as pilots, weather and mountains combined tries to kill us, so a very sound knowledge is needed
Look on Pooleys (could be 2 LL's) website and get one of the PPL books, don't bother with the ATPL syllabus manuals.
Cheers.