What books/movies show aliens as having a very different mind/thought process?
Almost all SciFi, when they have aliens, have them either as something we don't understand at all or as a human thought process/culture/abilities with certain exaggerations that make them an outlier compared to humans, but something that there are a few humans that would match.
In other words Ferengi are like a human that's very cowardly and is an amoral merchant. Unusual traits for a human but there are some people like that. We can understand them.
The book I've seen that does this the best is The Lost Fleet where the different aliens all are very different. It's not possible to think of them as a human with certain exaggerated traits.
What else does this well?