Other helpful LSAT test-prep books that I can personally recommend:
The PowerScore LSAT Logic Games Bible
Of course, the very best way to learn and improve your LSAT score (shameless plug alert!) is by hiring a master tutor like me — because 1-on-1 lessons are customized specifically for you and are thus the most efficient, and because independent, private tutors tend to be the best teachers. Still, we are not miracle workers: even the very best tutors/coaches will need at least 5-10 hours of instruction to make a big difference in your LSAT score.
You should also know that the traditionally paper-and-pencil LSAT briefly switched to an in-person, digital tablet format starting in July of 2019—and that shortly after the onset of the COVID-19 pandemic in early 2020, it switched again to an at-home, online, remote-proctored exam format (the new digital LSAT is administered by ProctorU, and the digital writing sample is administered by LSAC).
When the online LSAT (at the time called the "LSAT Flex" to avoid being confused with the short-lived, tablet-based digital SAT taken in a test center) was introduced due to COVID, the number of counted LR sections was reduced from 2 to just 1. Though the online exam was only 3 sections long for a time — with no experimental section — it now includes 4 sections, with one experimental section (RC, LR, or LG) and only one counted LR section, and is back to being called the digital LSAT.
You will need a reliable computer, a fast internet connection, and a quiet spot with no distractions in order to take the digital LSAT under optimal conditions.