Since I am now retired from ATF...Two days now...my office is in transition. I say that because my reference books are not yet unpacked. That being said, the specific book is not as important as the information. I often use a book to help with my report writing that has virtually every type of structural/architectural design that you may encounter in a fire investigation. Very helpful on things such as roof descriptions, but goes way beyond whether a roof is Mansard or Gambrel, it goes into every structural type one could possibly imagine. You may see an arch, but is it a "depressed, horseshoe or Ogee" Arch? The information is somewhere in the book.

Dan Hebert (aka Heenan)
Retired ATF-CFI
Forensic Investigations Group
IAAI-CFI/ECT/CI/
EIEIO