A Shiver of Light by Laurell K. Hamilton
We meet up with Merry and her slew of men as they are finding out Merry is having triplets instead of twins. The third baby is found right before Merry goes into labor and is much smaller than the others and seems delayed as if conceived after the twins.
The first half of the book describes the inner workings of an American goddess-like princess that is being pursued by the Seelie Queen of Air and…