Does anyone know what the titles of the other two heroes of Olympus Books?

the título to the other two libros are "the lost hero" and "the son of neptune"

The lost Hero, The Son of Neptune, The Mark of Athena, :D
.... if tu mean the two after that... well... we don't know yet.... :P
.... I think they will be called The Light of Iris and The arrow of Artemis... Idk... XD

Not released yet