I haven't read any of these books yet, but they are on my TBR list.
I chose Sally Singletary's Curiousity and MORE for similar reasons. They are both very clean and fresh. They both use a lot of white. Also, they both get you asking questions.
I chose January Black because the cover invites you in for a second look. At first glance you see a gate, at second glance you see the bird, and each time you look at it, you can see something else. The green vines come out, then you start to look at what's behind the gate.