And a general, extremely useful source of beta for Alaskan mountains is the Mountaineering Club of Alaska's monthly publication, The Scree. It's not a guidebook itself, but it is 60 years of trip reports which you can search by mountain here:
Edit 2: And if you go climb something cool, submit a trip report to the Scree! MCAScree@gmail.com, 1000 word-articles preferred, please submit photos as separate files (not embedded in a document)
Other than the Puryear guidebook from Supertopo there isn't a published guidebook.
There is some topos hanging around that get passed around from Alaska hardmen to guides. I would email Clint Helander and ask if he can point you in the right direction.
Edit: I guess there is another guidebook but doesn't sound like it has much more than Puryear's.