Her Last Estate. Art of the Crime, #2

Leah Cartwright is annoyed when her frustrating intern tags along on a morning appointment. As an auction house specialist, she's used to meeting with potential clients about selling their property for top dollar. James Covington, the bumbling British man at her side hinders her ability to charm with his incessant questions. But appearances can be deceiving. What starts as just another day on the job takes a turn as she uncovers a hidden staircase and witnesses a murder.
In the midst of a race to safety, she discovers a painting in the cellar and learns her associate is actually a former forger turned civilian informant, investigating her boss. When she stumbles upon shocking secrets about her sister, she's unsure what to think but trusts James Covington. She finds the painting in the database of missing art stolen by Nazis during World War II, stoking more questions.
If they can stick together, they might stay alive. Fans of Karen Rose, Lisa Jackson, and Brenda Novak will enjoy The Art of the Crime series.