Chandler's and Whisker's book is awesome. Kind of hard to find, but I did get a copy via the university interlibrary loan system five or six years ago so you might try that if you can't find one for sale.
I haven't seen Dyke's book, but of the other three I'd rate Chandler and Whisker's book highest. Neumann does include some useful dimensions, and multiple photos per gun, which is nice.