Some advice on a current Javascript textbook

Question

Over the last 5 years I've been mostly using free resources from various sites, however I'm now committed to improving my skills. Does anyone have any suggestions about a book to purchase? I'm considering the 7th edition of definitive guide to Javascript, I've previously read some of the 6th edition, however with it not including more upto date information on ECMAscript, I'm considering buying a paperback version. Many thanks for the input.

Answer 1

Anyone?