Found by Margaret Peterson Haddix

Fans of her Among the Missing series will find a lot to love in this new set of historical suspense novels by Margaret Peterson Haddix.  It all starts with a mysterious plane that appears with no adults on board, only babies, and disappears as soon as the babies are rescued.  In Found, the story begins when two boys realize (through a combination of first class sleuthing and stumbling discoveries) that they are part of this group of babies who have been adopted out but are now, for some reason, being drawn into the same area.  Strangers who appear and disappear at key points add to the suspense as we discover the beginnings of the true identities of these children.  As with all first books in a series, the story is really just getting started when the first book ends, but it would appear that there will be some interesting adventures throughout history as the two boys work to save all these children without wrecking time.  Fast-paced and intelligent with likable characters and just enough mystery to keep the reader guessing, this appears to be the beginning of a very interesting series.