However, many developers search for a free version of the to preview the content. While the author’s website frequently offers sample chapters (usually challenges 1-5), the full 57-challenge set is a paid product. If you find a "free" PDF on a file-sharing site, recognize that you are depriving a working developer (Brian P. Hogan) of his royalties. The cost of the book is less than two lattes—a negligible investment for a skill that pays $60+ per hour.
Hiring managers have tired of "puzzle lords" who can reverse a linked list but cannot validate an email form. The 57 challenges train you in .
Complete challenge #5 (Simple Math) in Python. Then, rewrite it in JavaScript. Then, rewrite it in Go or Rust. This proves you understand logic , not just syntax.