Postal Commemorative Society - First Day Covers and Special Covers Booklet

This Postal Commemorative Society booklet was issued to Mark Wolak. Every page has a stamped post card that explains what the commemorative stamp represents. I'm not a collector of stamps or postal memorabilia. If there's anyone out there who collects stamps, could you please tell me if this item could be considered collectible. If anyone has any thoughts or ideas they would like to share, please do. Thanks