Both. But I tend to move towards series especially in mysteries.
All my book reviews are and will be 100% honest. I don’t get paid to write them and I don’t get “gifts” to write a good review so what I write is what I think. If I love a book, I’m going to say that, if I don’t like a book, I will write why I don’t. My critics aren’t an attack to the author, they are just how I feel about a subject or a style. See more in my Review Policy.