Sometimes the best way to describe a book is to liken it to a meal. There are books that leave you replete to the point of sleepiness. There are books that feel like a hefty meal as one is reading yet later leave the reader feeling empty. There are books that remind you of salty treats.....you keep saying to yourself "just one more page, one more chapter," until the book is read (or the bowl is empty.)
And then there those other books---the ones that remind you of the dinner rolls and breadsticks placed in the middle of the table to distract the diner from slow service and mediocre cooking. If you eat the rolls the edge is taken off both your appetite and your palate.
I just finished a book like that.