are you talking about "green" spotted puffers? congo spotteds? there's a far range of spotted puffers out there (some BW, some FW, some both and then more SW), did ya have any one particular in mind?
Yes, read this book review: http://www.tomgriffin.com/aquasource/pufferreview.shtml
You can try buying it from Barnes & Nobel. It costs around $49. I paid $36 from an overseas bookstore that's out of business now (selling books to cheap?).