A collection of verse by the author of Lord of the Rings -- given a frame to fit in the universe. Most existed and were in fact published in places before that work. . . Tom appeared in Lord from here, not vice versa.
Sam's Oliphant poem and another piece of beast lore. Frodo's Man In the Moon one and another expanded nursery rhyme. Two narratives of Tom. Ranging in tone from the cheery and frivolous to the rather sinister.