guys! In my country i have new Percy book. It`s called Percy Jackson & The Olympians: Character Files. In it has Percy and Grover interviews, map from the Semigod Camp & crossword ^^ and 3 new Percy`s story. It`s great!
I'm happy for Ты that it's available where Ты live because that just means Ты can get your hands on it! I got it a little under a год назад and I loved it! I still do!
I read it after the Last Olympian (and it still made sense, except I was confused with where Persephone had been seen before), but before Остаться в живых Hero (though it makes sense either way, one of the stories comes back).