A collection of 30 bardic tales you may hear sung in the local tavern or empresses' court, complete with bardic verse excerpts from all 30 tales themselves.
Many of these tales can also be used as quick plug in adventures for Gm's looking for a side quest. (And let the players exploits be turned into the song by a near by bard perhaps?)
The heroes are travelling the great seas by ship. One night when the seas are calm and everything seems fine their vessel is eaten by a great whale. The end? No. They wake in the belly of the animal, it is like a great cave. Full of wrecked ships and strange things to be discovered. Will they make it out alive?