Constraint programming is a constantly evolving field, something which is explored at the annual International Conference on Principles and Practice of Constraint Programming. This conference provides papers and workshops which produce new insights, concepts and results which those involved in this area can then use to develop their own work. This title provides an accessible overview of this by bringing together the best papers on a range of topics within this subject area, thus allowing those involved in constraint programming to benefit from the new innovations and results created as a result of the conference.