Eidolon sky : a campaign frame for Spire RPG /
Howitt, Grant,author.
Taylor, Christopher,author.
Stone, Adrian(Illustrator),illustrator.
Howitt, Grant.Spire: the city must fall.
Title from cover.
"A sourcebook for the Spire RPG"--Back cover.
"A copy of Spire: the city must fall is required to use this product"--Back cover.