It's a quick read, just 17 well-organized pages with lots of screenshots.
Just how relevant it will be to your world depends on how you approach drum programming. If you're over 40 or into classic genres, chances are you
don't equate quantization with "tightening the groove". However, it does explain the mechanics of splitting clips at transients, something everybody will have occasion to do now and again, regardless of whether you're into electronic dance music or not.