One of Our Thursdays is Missing

It is a time of unrest in the BookWorld. Only the diplomatic skills of ace literary detective Thursday Next can avert a devastating genre war. But a week before the peace talks, Thursday vanishes. Has she simply returned home to the RealWorld or is this something more sinister? The written Thursday is soon hot on the trail of the factual Thursday, and she stumbles on a plot so fiendish that it threatens the very BookWorld itself. Only a trip up the mighty Metaphoric River can provide the answers.