This book is my favorite. You can never put this book down and it leaves you on the edge of your seat. Pegasus falls out of the sky and lands on Emily's roof. Another Olympian named Palen falls out of the sky as well. Emily is protecting Pegasus from the CRU, which are trying to capture Pegasus.The CRU have captured Palen, but after a few days Palen escaped from the CRU. Palen, Emily, and Pegasus set off to save Olympus and the Earth. I have also read the second book and the third book, and they are very GOOD and suspenseful. I cannot wait for the fourth book!