#5. Enzo Ferrari: Power, Politics and the Making of an Automobile Empire by Luca Dal Monte. Why yes? Many people around the world agreed it's that book you need to read because it's more than about cars, it's about a unique person, a strong man and his not easy life. Why not? Many motorsports fans told this book language isn't very easy.
#3 I remember the time when everyone had wanted to read this. How to Drive: The Ultimate Guide, from The Man Who Was The Stig by Ben Collins. I didn't read it, but this motorsports book must be in this note.
What else has to note?
Watching the Wheels: My Autobiography by Damon Hill in this note, because I'm waiting for it.
Naked Paddock Paperback by M. K. Ducote. That kind of book always has been a different view of motorsport racing.
You can find all the books at this (amazon link attached). Hope this shortlist was useful for you, did you read something of it?