Ecky Putrady is a software engineer with extensive experience in developing web applications. Specializing in the Java, Ecky discovered Haskell 4 years ago and was amazed by the potential the language could bring. Although resources were scarce, he learned the language by reading multiple blog posts and participating in active discussions in the Haskell community. That arduous process is what motivated him to write this book and hopes that new future practitioners of Haskell will become productive quickly.