"On the Edge: the Spectacular Rise and Fall of Commodore" by Brian Bagnall covers quite a bit of the Amiga development.

http://www.amazon.com/Edge-Spectacular-Rise-Fall-Commodore/d...

However, the rewritten / "second edition", "Commodore: A Company on the Edge" stops with the 8-bit machines, as there were plans to have two volumes - one for the 8-bit systems, and one for the Amiga days:

http://www.amazon.com/Commodore-Company-Edge-Brian-Bagnall/d...

The second edition, "Commodore: The Amiga Years" has been unfortunately cancelled, but is still listed on Amazon:

http://www.amazon.com/Commodore-Amiga-Years-Brian-Bagnall/dp...

How does Maher's book on the Amiga compare to Bagnall's first edition?