Whit, or, Isis amongst the unsaved is a novel by the Scottish writer Iain Banks, published in 1995. It is told in the voice of Isis Whit, a young but important member of a small, quirky cult in Scotland. The community believes that Isis' cousin Morag is in danger, and Isis is sent to help.

The smallest part or particle imaginable; a bit; a jot; an iota; -- generally used in an adverbial phrase in a negative sentence.

a tiny or scarcely detectable amount