Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: Time to go hit up the library - I have a lovely PILE of book reservations to collect this morning... #glee #books #reading
This tweet contains emotions: 
joy