As a Western student who has studied Sanskrit with both Western and Indian teachers, I cannot recommend this book AND its accompanying Yogic Studies course with the author enough (surprising affordable for university-level education). The book is very methodical and takes you on a steady journey to learning grammar and vocabulary. It’s difficult, but still very accessible if you stay consistent. I have learned more in the past 3 months than I have in the past 20 years—and am now actively reading/translating! The key here for me was committing to the accompanying course and taking this study seriously (i.e., showing up for live classes 2x week and doing the homework). This book + course is a total game-changer for the committed student and it’s also quite fun!
NOTE: there is no answer key in the book, but I emailed the author as instructed and received those files within 24-hours. Actually convenient, as I can print as-needed and have them on my desk.