Clojure from the ground up by Kyle Kingsbury.
From the post:
This guide aims to introduce newcomers and experienced programmers alike to the beauty of functional programming, starting with the simplest building blocks of software. You’ll need a computer, basic proficiency in the command line, a text editor, and an internet connection. By the end of this series, you’ll have a thorough command of the Clojure programming language.
The current posts look good and I am looking forward to further posts in this series.