@ copperkid - you should be able to get away without the Paul Overaa books, I'd recommend:
68000, 68010, 68020 Primer by Kelly-Bootle & Fowler
680x0 Programming By Example by Kelly-Bootle
Assembly Language and Systems Programming For The MC6800 Family by William Ford and William Topp (covers 68040, FPU and MMU that the earlier books don't...)
for learning 68000 assembly and
Amiga System Programmer's Guide by Dittrich, Gelfand & Schemmel
alongside the Hardware Reference Manual (easily available as .txt and .pdf) for learning the Amiga Hardware.
All these should be fairly easily obtainable from online bookshops.