O’Reilly’s Programming JavaScript Applications by Eric Elliott for free (Early Access release)

O’Reilly currently offers the entire book Programming JavaScript Applications by Eric Elliott for free (as an online-readable version) while its Early Access phase.

With this digital Early Release edition of Programming JavaScript Applications, you get the entire book bundle in its earliest form—the author’s raw and unedited content—so you can take advantage of this content long before the book’s official release.

There are even more upper-class O’Reilly tech books for free in the Early Access program, definitly a must-have bookmark.