I adore Jennifer Egan. She is a helluva writer. You have read A Visit from the Goon Squad, right? Ok good, just checking. 
 The Keep is a funky little book. It's a gothic novel with multiple narrators, and it is most definitely a page turner. Egan brings everything together extremely well in the end because she's just that good. 
 Not everything here is wrapped up neatly. That is probably the appropriate choice in this case though.