In my professional opinion as a teacher this is the best book to learn C programming from for absolute beginners to the language.

http://shop.oreilly.com/product/0636920015482.do

You can find a PDF on <the internet> I believe.

You'll also need a copy of this too.

http://prenhall.com/books/ptr_0131103628.html

There are PDF's all over the internet of that too.

Krashan's tutorials are what you will need after that and you can get PDF's of the Amiga ROM Kernel Reference manuals and the AmigaDOS manual at http://www.bombjack.org/commodore/amiga-books.htm

[ Edited by ASiegel 23.06.2015 - 15:09 ]