Forum:Changing positions help

I was just wondering, if you get switched to defense by a card like book of moon, and you haven't changed that monster's position that turn or just summoned it that turn can you switch it back to attack mode? Ex: i summon vorse raider, and i attack. my next turn, i attack again but this time my opponent has book of moon and uses it. can i switch my vorse raider back to attack mode main phase 2?