Seven Wonders #3: The Tomb of Shadows by Peter Lerangis

This book is the third episode in the series, and you should read the first two books before reading this one. Jack, Cass, and Aly are searching for Loculi hidden in the seven ancient wonders of world. The kids have uncommon DNA that gives them special powers, but they will die at the age of fourteen because of it. Jack is reunited with his father, and he travels with the kids to Turkey, the location of the third loculus. They find themselves in the underworld, along with lost souls. The kids will need to face zombies, fearsome creatures, and their worst fears. They will lose their powers in the process, and one character will sacrifice his/her soul to capture the Loculis.

I read this book a year ago before reading the first two. It was kind of like listening to people talk in a private conversation, since I didn't understand references to past events. This plot introduces some important changes to the storyline of the series. Characters are added, a main character is lost, and the base on the hidden island is destroyed. I was surprised by these unexpected changes.