When I applied, I read this and the Ivey Guide to Law Admissions. This one is better. It's more thorough and comprehensive. It covers the whole process, from why you'd want to go, the realities of school ranking, to preparing for the LSAT, essays, rec letters, resume formats, etc. Plus a whole lot of other things to consider, like financial aid, a touch on transferring, LLMs, international students, and his tips on how to succeed 1L year. Then there are a bunch of essay examples with (this is crucial) general info on who wrote it (their LSAT, GPA, previous school, etc.). It's well-laid out and written concisely - no pages are wasted, and it's a thick book.
When you go on a popular law school forum like top-law-schools you have to spend a ton of time reading it before you realize that it is a bunch of drones echoing the same crowd-sourced conventional wisdom, that law school is all a "numbers" games (GPA/LSAT). For average applicants who write average applications, it is. You soon forget that somebody actually reads your application, and that it matters. This book fills the whole other side that the forums don't, and I highly recommend it.
I got into a top 10 school with my bad GPA, and I credit my success to this book.