There's a lot of value to having "everything in one place" during the learning process and later for reference, plus the convenient dead-tree format means bookmarks are instantly accessible. They're also written by competent people and edited by professionals. I'm a fan.

Of course when one's chosen tech is too new, and/or moving faster than the book publishing process then one is stuck with Stack Overflow, random blog posts and insufferable YouTube vids. Which all also go out of date within a year.