The starting point is to begin with what LSAT says about its own test.
Three sources of “LSAT on the LSAT” are:
1. Powerpoint LSAT presentation from Law Services.
2. The LSAT Information Book
What is the LSAT really about? What does the LSAT really test?
Thomas White was the president of Law Services during the 80s. In 1991, he published a book called “Inside The LSAT”. It was the best LSAT book its era. The book was eventually retitled “LSAT Success” (and is now out of print). Have a look at his comments about what the LSAT tests. They speak volumes about how you must prepare: