Beautifully illustrated and a handy starting point when I want to write a spec piece but can't find inspiration. The Mythical Creatures Bible by Brenda Rosen includes creatures from a wide range of cultures, brief descriptions and effective categorisation.
My poem "Hate Circled the City" in Paper Crow isn't about golems, but reading the entry on golems sparked the poem.
Sometimes a starting point is all we need. Our wild imaginings take us on from there.