The main conflict is that Liesel's family is hiding a jew in their home
The main conflict is one of man vs. Society
I think the confliucvt of the lightning is is that percy is being framed for stealing zues's master bolt. Percy didnt steal it but has to go on a quest to find it before the summer solstice.
I think the internal conflict of the lightning thief is percy being a demigod...and not nobody knowin because hes not showing it from the outside and hes powers are from the inside...(hes blood)so that what be the internal of him...