Adding onto the authors’s own review, I liked the second part on learning Idris but for my purposes the real gem was that it took me from zero prerequisites to

Adding onto the authors’s own review, I liked the second part on learning Idris but for my purposes the real gem was that it took me from zero prerequisites to a good intuition for dependent type theory in a very clear way that prepared me to go even deeper into topics like Homotopy Type Theory. The works I treasure are those that can build understandings of really complex topics without the crutch of a lot of prior assumed knowledge. It takes incredible clarity to do that well. This was one of my favorite book finds of recent years.