Third in the Series

 Seven Wonders: The Tomb of Shadows by Peter Lerangis 

This was a very fast paced book. I really like this series; it's got action and adventure coupled with high stakes and nothing feels like filler. Jack, Aly, and Cass are searching for the 3rd Loculus. The clue left by his mom sends them into a trap, so she's bad. We get to tell his dad and he starts helping and using his resources to make things to easier on this quest. They adventure to Turkey and find a portal that takes them to the Bo'gloo and there Dr. Bhegad dies, he sacrificed his soul so they could get the Loculus and live, but it wasn't there. Instead, the find out that it was at the Natural History Museum in New York, so that's where they go. But, the KI has been breached because the man who helped them in Turkey couldn't keep his mouth shut. They find the Loculus, but dad gets arrested in the process. Then, they get attacked by shadows. Mom ends up helping them and they find out from Dimitrios that Marco isn't the one from the prophecy, it's Jack because he intentionally broke the Loculi of Healing to close the portal of the underworld to save everyone. So, Jack is going to be King. Not sure what he's going to be king of, but according to the prophecy he's going to be king. This was fast paced and exciting and I can't wait to read the next one! I would definitely recommend this series to my nephew and niece!