About the book (from Wikipedia):
The Hunting of the Snark (An Agony in 8 Fits) is a poem written by English writer Lewis Carroll. It is typically categorised as a nonsense poem. Written from 1874 to 1876, the poem borrows the setting, some creatures, and eight portmanteau words from Carroll’s earlier poem “Jabberwocky” in his children’s novel Through the Looking-Glass (1871).
The plot follows a crew of ten trying to hunt the Snark, an animal which may turn out to be a highly dangerous Boojum. The only one of the crew to find the Snark quickly vanishes, leading the narrator to explain that it was a Boojum after all. The poem is dedicated to young Gertrude Chataway, whom Carroll met at the English seaside town Sandown in the Isle of Wight in 1875.