While any spellcaster capable of casting planar ally, planar binding, and binding spells can conjure and bind genies, the true genie binder is a spellcaster who has devoted his life to the pursuit of this practice. Most genie binders study the works of Sulesh the Great religiously, but the best of them understand that even Sulesh wasn't infallible, and use his works as stepping stones to further perfect the act of genie binding.