Elemental Logic is a tetralogy written by American fantasy author Laurie J. Marks. Arguably an example of Low Fantasy, the series is set in the land of Shaftal, whose citizens are left without a spiritual leader after Harald G'deon, earth witch of the ruling House of Lilterwess, dies, apparently without vesting a successor with his power. Without a G'deon, and with the House of Lilterwess toppled in a single night, Shaftal is left at the mercy of the invading Sainnites, descending into poverty and a state of constant guerrilla warfare. Books in the series include: