The manga "Captain" by Akio Chiba has both paperback and hardcover editions in volumes 1, 2, 4, 6, 8, 9, 10, 21, and 25. "Play Ball" by the same author has both paperback and hardcover editions in volumes 1, 4, 9, 11, 14, 15, and 19. I haven't been able to collect them all at once, so the book sizes and volumes are mixed. There is some yellowing and soiling, but they are readable. For those who want to read those masterpieces even if they are incomplete, please consider them.