Superstition is currently on its second book. Links to both can be found below. These books are designed so that they can be read independently. Therefore, if you wish to begin with Book 2, you can do so without missing anything.
In fact, given the fact that Something Wicked This Way Comes was my first effort, it's quite rough and needs some editing. While I have received compliments on the end, the first third needs some major revamping. I plan to get to that as soon as I finish Book 2 - F Stop. But just a suggestion, you may want to start with F Stop, as my writing and pacing have improved.