My Little Pony: Friendship is Magic Volume 19
It's exam time at the School of Friendship, and Ocellus has come up with an idea for a stellar project that's sure to impress all her teachers--a history of Equestria shown through her own unique Changeling abilities! Then, Applejack helps Apple Bloom learn about the meaning of courage when she tells her sister a story about facing the biggest fear she had as a young filly- the water! And, when painfully shy Marble Pie tries to make friends at school, she ends up panicking and agreeing to throw a party instead!
Collects issues #84-88 of the My Little Pony- Friendship is Magic series.