The incredible Janet for Mortals book by Ian Henry was my first exposure to peg. It's very interesting and changed my thinking on programming in a big way. It's

The incredible Janet for Mortals book by Ian Henry was my first exposure to peg. It's very interesting and changed my thinking on programming in a big way. It's a free book. https://janet.guide/pegular-expressions/ https://janet.guide/pegular-expressions/