The Lake of Dead Languages by Carol Goodman
My rating: 4 of 5 stars
I understand why there are so many comparisons to The Secret History, and of all the books that I've heard that about this does come remarkably close but... it's just close.
There were elements I loved, like the atmosphere of Heart Lake and the town of Corinth. This is a part of the world I know well, having spent decades in Central NY. And the school/lake are based on Mohonk! But the flashbacks? Those could have been done a little better. And the twists were predictable to anyone who has (as I have) read a lot of thriller/mystery books. Especially the Big Twist at the end.