The 2nd & 3rd books in the Mysterious Benedict Society series.  I found myself underwhelmed by these books because the author sets you up for certain outcomes and takes you there, but doesn’t necessarily flesh out the plot or ideas fully.  Certainly, the balance of obvious conclusions with less predictable explanations is a fine line between giving your reader what they want and still keeping them surprised.  All this aside, these YA novels are charming and the main characters are lovable and this is a YA series I would say is appropriate for adults and kids, but mostly kids.  I like YA fiction, but this was perhaps *too* youth-oriented for the adult me.