I love the idea of Skiena's book. I don't love his editor. The second edition has an error almost every other page. The third edition isn't much better.

2nd Ed. Errata: https://www3.cs.stonybrook.edu/~skiena/algorist/book/errata

3rd Ed. Errata: https://www3.cs.stonybrook.edu/~skiena/algorist/book/errata-...