Great read on the early days of SpaceX "Liftoff: Elon Musk and the Desperate Early Days That Launched SpaceX " - by Eric Berger. Unusual because Elon gave Eric full access to current and former employees without restrictions.
The author is also a professional writer, so it does read very well - he also chose carefully illustrative moments in what must have been a trove of information to choose from.
Also: Tim Dodd's Everyday Astronaut has flourished, with the benevolent friendship of Elon, and now has a full fledged team, with a website very well organized
Side note: apparently there are a couple books in the making about Tesla.