1) Manual/book: We don't (didn't) use a specific "this is our institutional book everyone must follow" book, but we're now getting everyone using a modified technique based on CAP (1) and a protocol used by one attending at their previous institution. Prior to this, where I've been we used the "my diener/attending/senior-resident showed me to do it this way" technique. For reference numbers (weights, etc.) we largely use Finkbeiner's (2), though Ludwig's (3) is also pretty useful. I think for CPC/discussion Robbins can be useful, but doing searches based on specific findings is ideal to polish it off -- meaning I think one should go to an organ/system specific text or article, eventually.
1. Kim A. Collins, MD, and Grover M. Hutchins, MD. An Introduction to Autopsy Technique. 2nd ed. College of American Pathologists, 2005.
2. Finkbeiner, Walter, Richard Davis, and Philip Ursell. Autopsy Pathology -- A Manual and Atlas. 1st ed. Churchill Livingstone, 2003.
3. Ludwig, Jurgen. Handbook of Autopsy Practice. 3rd ed. Humana Press, 2002.
2) ME cases & autopsy numbers: Although the board of pathology isn't specific about this, the ACGME is. To count an autopsy towards your required numbers, you should be directly involved in 7 things -- review of history/circumstances of death, external exam, gross dissection, review of micro & any relevant lab findings, preparing the description of gross & micro/lab findings, developing opinion of cause of death, and review with an attending. There is some loose wording surrounding these requirements, like residents must participate in all aspects "as appropriate to the case," etc., which leaves the door cracked a bit to count things that really aren't appropriate but may be necessary because of a variety of problems culminating in too many programs being unable to provide adequate autopsy training. However -- I wouldn't start counting forensic autopsies that you only look over someone's shoulder for during just the first 3 of those 7 things. It's pretty hard to justify, IMO, despite it having some educational value.