Very comprehensive, useful guide. Provides summary of specialties and sub specialties. Discusses many factors relevant to specialty residency/specialty choice. Also helps you prepare for residency by explaining the best schedule to design regarding 3rd and 4th years.
Read roughly 1/3 in four days. The rest of the book is irrelevant to me at this point, but looking forward to reading it in the years ahead.
Key is to narrow down your niche as much as possible. Makes it easier to take websites that are useful for you, and reject what won't. This still means you have to share what you rejected with your friends in case they're really interested! Aside from that note, this book lists many fellowships that AAMC Careers in Medicine still haven't listed yet. Listen to The Undifferentiated Medical Student podcast in conjunction with this book, and you're solid.
I inherited a copy of the 6th edition (2003) from a medical student a few years ahead of me. I didn't crack the book open until summer of 4th year, only to find out that there is some helpful information regarding specialty selection and pointers for the early years of med school, too.
Iverson provides a lot of helpful information here, and it's probably best to take it in chunks. Some of it is fairly outdated at this point (10 years later), but seeing as the latest edition came out earlier this year I imagine those issues are resolved.
Great resource for med students. You've probably never even heard of the book otherwise.