A must-read to take your programming efficiency to

Best "practical" book on Vim you can get. Concise yet meaty. A must-read if you want to systematically take your Vim skills to the next level.

P.S.: Spacemacs https://github.com/syl20bnr/spacemacs is awesome! Integrates Vim emulation seamlessly with a powerful Emacs customization. Check it out and get rid of bloated IDEs.