** spoiler alert ** 
 Bob! argh, phone app won't let me mark this as spoilers, so I can't say too much, but HoH is pure awesome. love the revival of many characters, and the character development. will edit this once I get to a computer so I can make it spoilers marked. 
 Edit: Ok, a day late and a buck short, but elaboration time: 
 Nico - I had a feeling that Nico had a crush on Percy, and I really liked how Rick handled this. I just wish we had a PoV chapter from him. 
 Bob the Titan (Iapetus) - Freaking awesome. I honestly can't say anything other than that. 
 As stated, character development was fantastic in this novel. The above two are just tiny examples of that. I think I'm enjoying the Heroes of Olympus more than Percy Jackson and the Olympians, as the writing seems far more refined, and the plots are far richer. I'm just finding it so hard to articulate alll this.