I waffled between 2 & 3 stars. Read this at the beach as primer for reach the The Dark is Rising Sequence, because I hadn't read any Susan Cooper before.
This was a good yarn in the "2 kids thrown together on a journey, beset by a different trouble each chapter" vein. Well written, quick read. Didn't blow me away but it was fun. Wish I'd read it when I was younger, I guess.
It was kind of admirable that she glossed over some really interesting details that more boring writers would have written an extra two hundred pages about (the stuff about West whispering to his knife, Callie being descended from selkies).