Beyond the Grave, The 39 Clues Series

Beyond the Grave is a mystery novel by Jude Watson, published in 2009. It is the fourth book in the 39 Clues series, which follows the adventures of Amy and Dan Cahill as they race against their cousins to find the 39 Clues, a collection of objects that lead to a source of unimaginable power.
In Beyond the Grave, Amy and Dan travel to Egypt in search of the next clue. But when they arrive, they find themselves caught up in a deadly conspiracy. Their only hope is to find the next clue before it’s too late.
Along the way, Amy and Dan must decipher ancient riddles, solve puzzles, and escape from danger. They also learn more about their family history and the secrets of the 39 Clues.
Beyond the Grave is a fast-paced and exciting adventure story. It is also a story about family, betrayal, and redemption.