Board Thread:General Discussion/@comment-3568954-20150615120215/@comment-3568954-20150615141317

in the wiki page on here for God

http://camphalfblood.wikia.com/wiki/God

it mentions

under the trivia section

The metaphysical concept of a monotheistic  God  was briefly mentioned in  The Lightning Thief  and  The House of Hades. The  Devil  is briefly mentioned in the latter book as well.
 * Noah is mentioned in Percy Jackson's Greek Gods.
 * Saint Mark the Evangelist is mentioned in The House of Hade

which must mean its talking about the Abrahamic god.