Cold Vengeance by Douglas Preston and Lincoln Child

"A bonding trip for Pendergast and his brother-in-law, Judson Esterhazy, turns violent. Before abandoning a mortally-wounded Pendergast, Esterhazy announces his sister, Pendergast's long-dead wife Helen, is alive"--Provided by publisher.

The introduction of conspiracy thriller trope into the already amazing Pendergast series is refreshing and much more engaging than the 1st book in the Helen trilogy. To me, it felt like it had more tighter build up than the predecessor and the cliffhanger ending will definitely force you to read the next novel; which I'll be doing next.

Now that is how a middle book should be!! The story moves forward, there is still intrigue & you enjoy every. Page. Can't wait until I get through the next book and see how it all comes together!