This has been my favorite book ever since I first read it almost ten years ago. I've read it at least a dozen times - more than I've read anything else. It is an incredibly imaginative, dream-inspiring story that creates the world of Egon, a fantastic place where people visit Pleasure Dromes to experience the Universe, eat ragusa plums and stardew, drink silver-maroon tigra, and develop their minds much more than does humanity. The earth's ocean floor becomes the sky and people travel on rainbows using magnetism.
Davidson creates a world that people can easily identify with, but that is thoroughly unique and different from our world; and while Egon is incredibly fantastic, Davidson makes it believable - as though it really exists - which makes the book more enjoyable, because we feel like we can actually escape into its secret world. *Under Plum Lake* is a book that will remain with me for the rest of my life.
*Under Plum Lake* can be enjoyed by children and adults alike, on either a lighthearted level or a deeper philosophical level -- for in addition to exploring a fantastical world (from the view of a young human boy), the book ponders knowledge, life, time, perception and deception, sanity, memory, existence, humanity, and the universe... or, to borrow a phrase from Douglas Adams's Hitchhiker series (also really good), *Under Plum Lake* ponders "life, the universe, and everything."