[SCRIPT] Three Books puzzle

[serbusfish]

I am wanting to have the player pull out three books and have a door unlock, and if possible have a time limit + the ticking sound as in the base Amnesia game. I looked how Frictional did it but I cant make much sense of how it works to be honest and I looked for a tutorial but cant find any.

I have added 3x script areas in front of each book for them to collide with but that's all I dont know what to do with the script. I'm guessing some sort of local var is needed? Any help would be really appreciated.