Adnan Masood 
Learning F# Functional Data Structures and Algorithms [EPUB ebook] 
Get started with F# and explore functional programming paradigm with data structures and algorithms

If you have just started your adventure with F#, then this book will help you take the right steps to become a successful F# coder. An intermediate knowledge of imperative programming concepts, and a basic understanding of the algorithms and data structures in .NET environments using the C# language and BCL (Base Class Library), would be helpful.