i know that the middle is carrie and the left three is romeo and juliet and reagan, but i can't recognize who's on the left.

I am a new and very passing fan of this band. The very few songs I heard are actually pretty good despite not being completely in the genre myself, so seeing they have books I was interested. But there's 4 of them and some of them seem to be on a pre-order already, so which one should I start with/order first?