I prefer to do one or the other but not both. When I read a book my mind makes up voices for all the characters and an audiobook would interfere with that I think

That being said, sometimes I can tear thru books faster with an audiobook. (I got hooked my my son who has severe dyslexia and was encouraged to use audiobooks)

For books I really enjoy, I recommend just reading them. And I absolutely loved all the hunger games.

When I have a difficult time concentrating I read out loud to myself, sometimes having to repeat lines slowly

You said you don’t want spoilers and yet you’re asking for spoilers! Just keep reading and eventually it will all make sense.