The Lost Hero by Rick Riordan

Book Description- "After saving Olympus from the evil Titan lord, Kronos, Percy and friends have rebuilt their beloved Camp Half-Blood, where the next generation of demigods must now prepare for a chilling prophesy of their own: Seven half-bloods shall answer the call. To storm or fire the world must fall. An oath to keep with a final breath, And foes bear arms to the Doors of Death. Now in a brand new series from block buster best-selling author Rick Riordan, fans return to the world of Camp Half-Blood. Here, a new group of heroes will inherit a quest. But to survive the journey, they'll need help from some familiar demigods."
    This is the first book out of five in the Heroes of Olympus series. If you're a fan of Percy Jackson and the Olympians then you will LOVE this new series that continues the story of Percy and other demigod friends. The writing is amazing and there are cliff-hangers at every turn. And more surprises than you can handle. If you haven't read this book, or the series for that matter, then you must! I mean it, right now! Get up and go buy it. It's just that good.