This is by far the best book around for learning Clojure from scratch (IMO).

If you always wanted to learn Clojure but never had the time, 2017 is the right year, and Clojure for the Brave and True is your companion. Buy it, or just read it for free on the website.

(Disclaimer: I'm not in any way associated to the book or the author, I'm just super thankful for all the times this book has helped me to learn new things and solve issues :)