The book is by Keith Sparks, and it is well worth the price. Keith did not invent the process, it has been around since rigid foam insulation was invented, but he put together a very nicely structured book that will guide just about anyone to success using his methods.

He is a regular poster on RC Groups and has a great B-25 build thread going on (with free cutting templates and plans) over there at present in the "Scale" forum. http://www.rcgroups.com/forums/showthread.php?t=571313

He posts under the username "Sparks" and will sell you the book directly if you contact him. He might make a couple of bucks more per sale that way and he deserves to get it.

Tom