Books on technology age quickly. Of course online content like docs and blog posts are going to have the most up-to-date information about a technology. But books ain’t dead. And print books still outsell ebooks.
Don’t underestimate the affordance of a book. Instead of reams of online articles or procedurals, you can encapsulate it in a tangible, portable asset that goes where you go, and tells the story of your community or product.
I spoke about this topic at DevRelCon 2021.