Bookworm Central Book Fair eWallet - Create Your eWalletOur eWallet allows family and friends to create a cashless/cardless payment option for students to use at a Bookworm Central Onsite Book Fair. Ours is unique because you enter the maximum amount a student can spend but your card will only be charged the amount actually spent.It will not be rolled over into book fair credits, nor will you lose unsent funds.