Coincidence …?

I’m in the midst of writing a review for a book in which I’ve said ‘the premise is an unusual one’ and when I started the review this was true, however it shares a lot in common with my current read. The books were published within weeks of each other and I’m in no way suggesting that there is any connection, copying, collusion or anything in any way underhand – it’s just pure coincidence. And I’ve noticed how frequently this seems to happen. Through a purely random choice of what to read next I’ve often spotted surprising coincidences from the small, such as two books using the same unremarkable US location, to a more fundamental plot device.

Synchronicity, coincidence? Has this happened in your reading? And can you figure out the two books I’m referring to at the beginning of my post (if it helps they were both published in 2013).