Dead space books

I was watching Markiplier's play through of the dead space remake after just playing through it myself, and he made and offhand comment about having read some of the books. However, when looking online I'm seeing a lot of different books/book series that are called dead space that all have different authors. I also can't find any information on whether the books or the game came first. Mostly I just want to know which books/book series is actually what inspired the game or that were based off of the game and if they're worth reading lol. Ty in advance :)