たくさんのふしぎ　からだの中の時計　なぜ君たちはグルグル回るのか　 福音館書店

Listed on Yahoo! Auctions Japan by a third-party seller. Photos and the full description are on the original listing (in Japanese).

Our price is the seller’s Buy It Now price plus domestic shipping to us – no service fee. After you pay, we buy the item at that price, check it when it arrives and ship it to you, so delivery takes a little longer. If the seller has already sold it, we refund you in full.

The shipping weight is our estimate for this type of item. If the item turns out to be much heavier, we contact you before buying it. We check the item visually when it arrives but cannot test every function, so please read the seller’s description carefully.