It doesn't happen very often in life, that utterly unexpected sequel that drops in your lap years after the original book came out. Most of the time, you discover series you love and blow through them at lightning speed and then are left to pick up the shattered pieces of yourself when the whole glorious thing is over. Or you stumble across gold with the very first book and are forced to not-so-patiently wait one year (or more) for each new installment. But occasionally an author hits you with one out of left field. I first read and adored A Certain Slant of Light not too long after it was published in 2006. It felt like a perfectly contained standalone novel to me at the time. And it still is. If you only read that one, you will be left content. But there are a couple of . . . I hesitate to call them side characters . . . that you certainly would not object to spending more time with, if you know what I mean (series addicts: I know you know what I mean .) So when I discovered ...