I'm mixed on this book. On the one hand, it helped me get an offer from a FAANG (study up on your binary trees, kids). On the other hand, it doesn't actually do a great job teaching the material, and the reference language is Java (ugh). This is a good refresher if it's been a while since CS101, but the best argument for this book is that it's dragged the world of tech interviews into it's gravitational field.