Hyper Yo-Yo Technics Maintenance Collection 3-book set, rare, out of print, vintage, published by Shogakukan. These are books I actually read when I was a child. Even now, rereading them brings back fond memories, and I remember collecting various yo-yos. They were found during a cleanup at my parents' house, so there is some fading, but they are in a condition that is perfectly readable. The Hyper Yo-Yo Technics bonus sticker has been used. Highly recommended for those who are into Hyper Yo-Yo, those who want to reminisce, and collectors. Thank you. [Contents] ・Hyper Yo-Yo Technics ・Hyper Yo-Yo Maintenance ・Hyper Yo-Yo Collection #Shogakukan #CoroCoroComic