A disappointment. No, it's not that I "missed" the physics. Surely half a point deduction is due to my e-reader attempt. But a roster of (ten) possible multi-verses. File this one under the philosophy of science. Greene offers plausible means for verifying two or three of the candidates. It's interesting that we are on the verge of such experiments, but this feels like Greene is laying down a marker for the 23 (or later) century. It was fun speculating on "where" the electron may be: Grant's Tomb, or Central Park. The one takeaway is to consider the observer herself must be "located" with quantum considerations as well.