I have very much enjoyed all the Dekker books I have read so far. The Circle trilogy (Black Red and White) I think are his less weird books. After those he gets a little more into thriller.
I posted this somewhere else but I can't remember which thread but Dekker ties a lot of his books together subtly in some but there is a tie. The Circle Series (Black, Red, White, and Green) The Lost books timeline is weaved throughout the Circle books. The Paradise Series (Showdown, Saint, and Sinner) House and Skin are loosely tied in just from a mention in one of the Paradise books about the villain in House and the desert and seeing a man on a horse in Skin for the Lost books and in the Lost books he sees a man looking for a town for Skin. It is very interesting.
Dekker’s Martyrs Song Series is good too. The first book is short but sad and Todd Agnew Sung the song that is in the Martyrs song book. It is a nice song.
Three and Obsessed are the only two books that I have read so far that stand alone. They are good too.