Tequila

Little Johnny asked the librarian how to use the card catalog. After pouring over the little drawers full of cards he approached the librarian again, wanting to know how to spell "tequila."

"T-e-q-u-i-l-a," spelled the librarian, and Little Johnny went back to his search.

A short time later he came to the desk, looking quite upset. "I just can't find it." he said.

"What book are you looking for?" the librarian asked.

"Tequila Mockingbird."