Shadowrun: Cutting Aces is a sourcebook for Shadowrun and provides an odd mixed bag of information on the metaplot and setting which providing more options for social-based characters and challenges. As it covers some neglected aspects of the Shadowrun world, such as the Middle East and social skills, it is probably a good investment for a GM but the book is so unfocused unless cons or Constantinople are the focus of your campaign, I cannot say that it should be a priority to acquire.
Shadowrun: Cutting Aces, is a Deep Shadows Sourcebook for the 5th edition of Shadowrun, this particular book covers a variety of sins, confidence games and swindlers, Constantinople (formerly Istanbul) and a bit more about current events in the Sixth World.