Another entry in the excellent Vernon Geberth edited series of textbooks on practical applications of criminal and forensic investigation. Dense, crunchy, intended for medical professionals (I learned two new words--"cachectic" and "hemoptysis"--and my medical Latin is pretty darned good for a non-doctor), and full of the usual assortment of incredibly gross but illustrative scene photos.
There's nothing like a nice forensic pathology textbook to make you realize that we're all here on sufferance.
Also, to make you wear your seatbelt always, and give up drinking for good. In fact, I think the phrase "positional asphyxia" alone is nearly enough to turn me into a teetotaler.
I did learn a whole bunch of interesting and useful things, however. If you can hack color photos of avulsed flesh and autopsy photos, and you're not scared of big Latinate words, it's a useful writer resource.
And--hey, BONUS!--it's not nearly as nightmare-inducing as Practical Homicide Investigation or the ever-popular Sex-Related Homicide And Death Investigation, which is the single most disturbing book I own.
(I'm pretty sure that second one is the legendary Red Book that one of the Criminal Minds writer/producers locks in the trunk of his car overnight, because he won't sleep with it in the house. Yes, it really is quite bad. No, I'm not very squeamish; I worked in a hospital and I hang around with EMTs and cops. The cat nearly gave me a heart attack by jumping on my pillow one night when I had been up late researching something in that one. I woke up absolutely certain Ted Bundy was in my room.)
...and so to bed, since I have to get up in just a few hours and start driving.