The Twelfth Card by Jeffery Deaver (2005) Simon & Schuster

A Lincoln Rhyme novel about a 140-year-old case, a descendent, and people who want to kill her.  These are today’s Nero Wolfe novels.  Lincoln Rhyme as the shut-in Amelia Sachs as his Archie, doing all the footwork.  There is a space-filling part that grows and is repeated a dozen times in the book, taking up at least 10% of the pages.
In this one, a high-school student wants to write about an ancestor, whom she feels was wrongly accused of stealing a foundation’s treasury in the days just after the civil war.  Other people are also trying to find out about the incident.  A professional hitman wants to find her, there’s a potential terrorist involved, two different accomplices, an estranged father who wants to reconnect, and a banker who will do anything to protect a secret.