-_- Chapter fifty-one, second half. Be warned. 
 In The Mark of Athena, Percy, Hazel and Frank meet up with four others from Camp Half-Blood: Jason, Piper, Leo, and Annabeth. This book's main conflict is pretty simple: Go to Rome, stay alive. Their goal is to make it to Rome, find Hazel's brother Nico, and find the Doors of Death. 
 This book takes place all over, but the main setting is on Leo's warship: The ArgoII. They visit Kansas, Atlanta, and some more places. ;) 
 I loved, LOVED, that Annabeth's was one of the narrators. It fun to see form her point of view for the first time. Annabeth is such a kick-butt girl, it's fun to see her point of view on things. Percy, of course, narrated some chapters too. The two of them together again was hilarious! :D 
 The book was funny, had lots of action, problem solving, and Diet Pepsi(Don't ask). I was laughing my head off at some things Coach Hedge did: One of which he's on the boat yelling, 'Bring it on lake! YEAH!' I thought that was hilarious. 
 The ending. -_- Oh. My. Freaking. Gosh. The ENDING. Rick did his first real cliffhanger. (view spoiler)[They fell into Tartarus and Leo said he was going to blow Gaea up with bigger weapons! Hello?!?! CLIFFHANGERS! (hide spoiler)] I admit though, I enjoy when something happens to the main characters because otherwise it seems like you're favoring them too much. I'm glad Rick writes suck great books but.....PLEASE! Faster! Or at least a chapter sneak peek? Please? 
 Well, anyways, I recommend to Rick Riordan fans, people who love mythology, and action lovers. If you've read The Lost Hero, The Son of Neptune, and Percy Jackson and the Olympians series..You are bound to love this book.