Blood River Down by Charles L. Grant
Series: The Quest for the White Duck Trilogy, Book 1.
Approx. 93,450 words.
Published on June 1, 2012 by
Gideon Sunday, an ex-semi-professional American Football player, goes to his pantry to retrieve an awful bottle of his (dead) sister's fruit preserves. When he gets there, he discovers a meadow in his pantry. He closes the door, takes a few breaths, and begins to investigate with as much sanity and candor as Sherlock Holmes.