4.5 stars. Just like the Percy Jackson & The Olympians series, The Lost Hero kept me hooked. I loved how it’s like a puzzle and every little pieces came together. Jason’s missing memories. Piper’s dream. Leo’s past. It’s all amazing. I also loved how Rick Riordan mixed Greek and Roman mythology without major confusion on the reader’s part. Throughout the whole book, I keep wondering where my Percy Jackson is. It gets me on the edge. Honestly, I have a feeling that this series would be better than the Percy Jackson & The Olympians series and that’s saying a lot!