15 mystery books including Yukito Ayatsuji's "The Decagon House Murders". There are age-related tanning and stains, as well as folds and creases, but they are readable. These are used items stored at home, so please only purchase if you understand this. They will be packed in a plastic bag and shipped anonymously via YuYu Mercari Mail. We do not sell them individually. Thank you for your understanding.