Mastering OCaml Programming: From Basics to Expert Proficiency

Professional OCaml Programming: How to Engineer Industrial-Strength Systems with OCaml (Mastering Emerging Programming Languages)

Real World OCaml: Functional Programming for the Masses

OCAML PROGRAMMING FOR FORMAL AND FINANCIAL SYSTEMS: Mathematically sound programming for safe high-assurance applications

Programming with OCaml: A Practical Introduction to Building Correct, Maintainable, and Performant Software