ok so yesterday me and luda are dueling and i attack with my monster and he activiates metal reflect slime...... so as soon as he activates it i play my book of moon... now are big question is what happens here does it have to be reset back at the spell and trap zone and if it does can he reactivate it again or does he have to wait a turn again....just what happens to it please someone help out cuz were both confused

There are these two rulings from Embodiment of Apophis, another Trap Monster.

Those two rulings should be enough to answer your questions.