The Hedge Knight by George R.R. Martin
My rating: 4 of 5 stars
The Hedge Knight takes place about a hundred years prior to the events in A Song of Ice and Fire. This short story recounts the adventures of Ser Duncan the Tall who sets forth to the tourney at Ashford Meadow in search of fame and glory and the honor of upholding his oath as a knight of the Seven Kingdoms. This novella is short, interesting and a much faster read. It added further depth to the already expansive world of Westeros. Highly recommended novella for every fan of A Song of Ice and Fire series.
Erebos 
This is the only Dunk and Egg novella I’ve read. Need to check out more of those….