I have other baby sleep books for sale too! I will discount 100 yen for combined purchases. I am not considering price reductions at this time. As these books are several years old, there is some fading and wear on the covers, but the contents are clean. I would appreciate it if those who understand that these are stored at home and have been inspected by an amateur would purchase them. ① The Baby Whisperer Solves All Your Problems Tracy Hogg ② The Baby Whisperer's Sleep Solution Tracy Hogg ③ The Happiest Baby on the Block Harvey Karp This is a set of 3 parenting books. They have been stored for a long time.