Final Twist by Jeffery Deaver (2022, Us-Tall Rack Paperback)
Deckle Edge: Deckle edge is the feathered edge of a page. Traditionally and historically, this was a side effect of the process of making paper. Bump: Indicates that the affected part of the book has been impacted in such a way so as to cause a flattening, indention, or light bending.