kinda funny tho afraid wih this card.
the only difference between book of moon and murmur of the forest :-
book of moon : quick effect
flip face down
murmur of the forest : normal spell card, flip face down, return all field spell card.
just different quick effect and not quick effect
Book of Moon can be used to our own monster. And being a quick effect, that means Book of Moon can save our monster from that Karma Cut- (-is A B*tch) that everyone plays.
Books of moon's ability to save from karma cut is not that useful if you needed that monster to start a combo, or if they are just going to swing over your monsters in def.