I have begun studying for probably one of the most difficult tests in my career. (NEXT TO THE BAR EXAM). This is really awesome to have. It tests your critical thinking which is the essential part of the Lsat. Don't get me wrong, you're going to want to drown yourself in coffee while studying from this.
This was one of the more useful books I used to prepare for the LSAT. It comes with ten authentic LSATs from past years. Answers are provided, but there is no answer key, so this is best paired with another prep book, or it can be a helpful resource for someone who is very familiar with the test already and wants to practice with as many different tests as possible.