As the Princess of Friendship, the only thing Twilight Sparkle loves as much as books, reading, books, making new friends, books, spending time with her friends, and...books...
...is spreading the magic of friendship. And one easy way to do that is to introduce your friends to each other.
In need of a weekend away from the castle before heading out to the Crystal Empire to spend time with her family, Twilight decides to take a little vacation to the human world...and brings three of her newest friends along.
After all, if Princess Ember, Moondancer, and Starlight Glimmer are all Twilight's friends, surely they'll get along well with each other and with Sunset Shimmer!
Right?
(Cover compiled from various source vectors.)