I've got an Amiga 500 that now works, and I have a book on Amiga BASIC and a disk with Amiga BASIC. Is this any good???
No.
The following BASICs for Amiga are each 20x better or more:
True BASIC
Metacomco BASIC
A/C 97
HiSoft BASIC
AMOS
Ace BASIC
Blitz BASIC
COMAL
Basic V
GFA BASIC
bywater BASIC
Pure BASIC