This belonged to my son about 15 years ago, so they were published around 2010. The four books on the right side don't have outer covers. In the second photo, "Fish" has traces of sticky notes in about 5 places as shown in the photo. The cover on the back of "Space" in the third photo is slightly torn. The "Dinosaur" book in the fourth photo is missing the Tyrannosaurus rex life-size poster. The "Vegetables" and "Fruits" books were purchased later, so they are in good condition. The others have minor scratches, but are relatively clean. Please understand that these are used items that have been used by a child.