For your consideration, here is a Lot of 5 Secrets of Mary's Bookshop Series Hardback Books, published by Guideposts.  They have some wear on the covers and a little tanning of the pages.  There are some numbers written in pencil, on the first few pages, on four of the books.  Items pictured are the actual items up for sale and come from a non-smoking household.  (612.325x-zc)

Here are the books with the number in the series, authors, copyright year and number of pages:

2.  Rewriting History, Vera Dodge, 2012, 265

3.  Reading the Clues, Charlotte Carter, 2012, 263

10.  By the Book, Carolyn Greene, 2013, 261

11.  Disappearing Acts, Kelly Ann Riley, 2013, 281

12.  A Classic Case, Camy Tang, 2013, 260