There are a couple of others referred to at
http://6502.org/books .
I have Fischer's book, "65816/65802 Assembly Language Programming", ISBN 0-07-881235-6, shown
here. The Amazon price is ridiculous, and is a result of websites' software upping each other, not from humans fixing these prices; so look around and you'll probably find it for $5 or $10.
There's also this book on eBay "The Apple II
GS Toolbox Revealed" by Danny Goodman (I'll put the entire listing name since the one is likely to get sold and other will pop up), "1986 Apple IIGS Toolbox Revealed 65816 Assembly Language Programming GS/OS",
here. I have the "Apple II
GS ProDOS 16 Reference" ISBN 0-201-17754-4 from Apple (which Amazon shows
here, and there are apparently several other such Apple II
GS books from Apple.
The Eyes & Lichty book is also available free at
https://archive.org/details/0893037893P ... ngThe65816 .
The Eyes & Lichty book you referred to is the best IMO.