The Rosetta Coin — Dana Lyons

An artifact many have died for. An adventure that could change the world. In the heart of London's elite social scene, Madelyn Fox has obtained an ancient artifact that could change humanity's view of science, religion and mankind. But if she shares her discovery with the wrong person ... For centuries, the full wealth of the St. Germain family has been behind the protection of a secret so immense, so powerful, not even Solomon St. Germain himself knows the extent of it. A descendant of the world's most famous Egyptologist, Nicholas Alexander Carter doesn't have to guess what Mady knows-or what she has-because he also possesses a rare piece of this archeological puzzle. Mercilessly tracked by a terrifying old enemy, the three unite in an explosive chase through gritty streets, marble estates and underground bastions as their treasure trove of knowledge falters on the edge of disclosure-or destruction.