[MrPowers]

Congrats! Did O'Reilly give you valuable technical feedback while you were writing the book? I was in talks with publishers, but decided to self-publish (https://leanpub.com/beautiful-spark/) because I didn't get the impression that the book publishers would be able to help at all with deeply technical issues.

[e_ameisen]

O'Reilly did organize the tech review process, where they found multiple reviewers to give detailed feedback on every part of the book. The O'Reilly staff themselves helped immensely with the editing process, as well as decisions about which topics would be the most worthwhile to include.