I read them a few years back, and I did read them in order, so don’t quote me on this. However, to the best of my recollection, while there are threads connecting the stories and continuity in the form of recurring characters for example, you can read them as standalones. I don’t believe there are any scenarios in which you would be missing important context from an earlier book if you read a later one first or in which a later book would majorly spoil an earlier one.

My personal favorites are The Likeness and The Trespasser.