Greco-Roman humanoids List of characters in mythology novels by Rick Riordan

^ riordan, rick. sea of monsters (british first ed.). puffin. p. 265. isbn 978-0-14-138149-7. 
^ cite error: named reference lastolympian invoked never defined (see page).
^ riordan, rick. lightning thief. percy jackson & olympians (1 ed.). puffin. p. 375. isbn 978-0-14-138147-3. 
^ riordan, rick. battle of labyrinth. p. 342. isbn 978-0-14-138291-3. 
^ cite error: named reference titan s curse invoked never defined (see page).