Beginning F# 4.0

This book is a great
foundation for exploring functional-first programming and its role in
the future of application development. The best-selling introduction to
F#, now thoroughly updated to version 4.0, will help you learn the
language and explore its new features.

F#
4.0 is a mature, open source, cross-platform, functional-first
programming language which empowers users and organizations to tackle
complex computing problems with simple, maintainable and robust code. F#
is also a fully supported language in Visual Studio and Xamarin Studio.
Other tools supporting F# development include Emacs, MonoDevelop, Atom,
Visual Studio Code, Sublime Text, and Vim.

Beginning F#4.0 has been thoroughly updated to help you explore the new features of the language including:
Type ProvidersConstructors as first-class functionsSimplified use of mutable valuesSupport for high-dimensional arraysSlicing syntax support for F# lists
Reviewed by Don Syme, the chief architect of F# at Microsoft Research, Beginning F#4.0 is a great foundation for exploring functional programming and its role in the future of application development.