Ptolus Bonus Map Pack is available as a free PDF download
From the front cover:
Welcome to the Ptolus Bonus Map Pack. Inside you will find 25 maps originally appearing in the adventures from Ptolus: Monte Cook's City by the Spire and Ptolus: The Night of Dissolution. Each map is presented as a full page image for easy reference and includes the original labeled version and a version with most of the labels removed. Only title, scale, and compass have been left on the unlabeled maps. Each map references the chapter and page number where it originally appeared so you can find the information you need quickly during game play.