Actually it was an island! Right in the middle of the wooded acres surrounding their new home up in Connecticut! On one side was the pond, on another a wide brook, and running from that to the pond, another, narrower brook. So here the four young Guthries were, "cast away on a desert island" which they promptly named Invisible.

Mother sent "rations" from "the wreck" which was the name they gave the house beyond the orchard; David discovered a cave; Winkie who still believed in fairies, caught a glimpse of a dryad (with freckles); and a pleasant shivery mystery hung over the island from the very beginning. Solved, it put the happiest possible ending to a story already bursting with all the things children love. Here are summertime and the out of doors and make believe all woven into a story of exceptional beauty.

From the dust jacket