These are very interesting. Somehow if you can integrate people instead of the book, or in addition to, is where we think the visuals need to go.
#24 is nicely symmetrical and clean. Could replace the book with a row of people?
#21, 23, 26, 27, 29: interesting with the letters and puzzle pieces coming from the pages. And the integration of the building on the right hand page is clever. Can the puzzle pieces and letters be turned into people that are somehow integrated? Could the people be walking on the left hand page?