Kane Chronicles Book 3: The Serpent's Shadow

The Serpent’s Shadow is the third book of the trilogy of Rick Riordan's Kane Chronicles.
In this books, Carter and  Sadie Kane, the  main characters are to battle with the Serpent God in its quest to overthrow the Gods out of power, Eat the Sun (which literally means destroy the Sun God Ra, mortal enemy of Apophis) and eventually destroy the world.
In the Second Book, Apophis was accidentally released from its Prison after Bast the cat Goddess who was saved by Carter and Sadie's mom that apparently caused her her life in the process.
Lord Ra has been awaken only to be a useless senile old man who is much of a bother than help. What more he needs to be strictly guarded by Gods of highest magic during the night because he is at risk being killed by the avenging Apophis.
In their journey to find answers on how to kill Apophis, they managed to bring Bes' the Dwarf God back to life by calling its soul's 5th element, it's shadow and Pulled it back to life.
They have come to a plan ,execrate Apophis' shadow, which may seem impossible but with the help of other God's they managed to turn out victorious in the end.
Lord Ra gave the throne to Horus and the Gods returned to Duat leaving the human world.

My Thoughts:
I guess there would be a collaboration between Riordan's Kane Chronicles and the Heroes of Olympus based on the following scenarios ..
Sadie talks to her mother who asks her to be careful because her gift of prophecy has shown her visions of "other gods" and "rival magic".
Sadie also mentions having to check out "unexplained magic" in Long Island. In Rick Riordan's Heroes of Olympus, Long Island is where The Greek Camp Half Blood resides.