8 CD set - 7 on the topic and 1 which summaries other Portable Professor presentations. I listened to all of these taught/narrated by Margaret Macmillan who, besides being totally knowledgable of the subject, has a perfectly clear delivery and thought process that leaves little doubt as to accuracy. It is interesting how these 1918-23 events still play a role in goings on today , 100 year later, especially in the Mid-east. The CDs are mint as is the booklet, which I never opened. The slipcase has some edgewear.