It's been over a decade. My guess is that there will never be an MCO16.
Jessica Simpson is editing MCO 16????

Opening data bases seem to have supplanted print editions of MCO.
I saw 2 copies of MCO 15 (2008 paperback) in a used bookstore today. In new condition, remaindered.

𝓌ℴ𝓌, ℳℴ𝒹ℯ𝓇𝓃 𝒸𝒽ℯ𝓈𝓈 ℴ𝓅ℯ𝓃𝒾𝓃𝒻. . 𝒯𝒽𝒾𝓈 𝒷ℴℴ𝓀 𝒾𝓈 𝓇ℯ𝒸ℴ𝓂𝓂ℯ𝓃𝒹ℯ𝒹 𝒻ℴ𝓇 𝓉𝒽ℴ𝓈ℯ 𝓌𝒽ℴ 𝓌𝒶𝓃𝓉ℯ𝒹 𝓉ℴ 𝓁ℯ𝒶𝓇𝓃. 𝒜 𝒷ℴℴ𝓂 𝓉𝒽𝒶𝓉 𝒾𝓈 𝒸ℴ𝓂𝓅𝓁ℯ𝓉𝓌 𝒾𝓃 𝒹ℯ𝓉𝒶𝒾𝓁𝓈 𝓌𝒽𝒾𝒸𝒽 𝒶𝓇ℯ ℴ𝓀𝒶𝓎ℯ𝒹 𝒷𝓎 𝓉𝒽ℯ ℊ𝓇ℯ𝒶𝓉ℯ𝓈𝓉 𝓅𝓁𝒶𝓎ℯ𝓇𝓈 ℴ𝒻 𝓉𝒽ℯ 𝓌ℴ𝓇𝓁𝒹.
ℳ𝓎 𝒻𝒶𝓋ℴ𝓊𝓇𝒾𝓉ℯ ℴ𝓅ℯ𝓃𝒾𝓃ℊ𝓈 𝒶𝓇ℯ:𝒩𝒾𝓂𝓏ℴ𝒾𝓃𝒹𝒾𝒶𝓂 𝒹ℯ𝒻ℯ𝓂𝓈ℯ, 𝒬𝓊ℯℯ𝓃𝓈 𝒢𝒶𝓂𝒷𝒾𝓉, ℬℯ𝓃ℊ𝓀ℴ ℊ𝒶𝓂𝒷𝒾𝓉 , 𝒻𝓇ℯ𝓃𝒸𝒽 𝒹ℯ𝒻ℯ𝓃𝓈ℯ, 𝒞𝒶𝓇ℴ 𝓀𝒶𝓃𝓃 𝒶𝓃𝒹 𝒢𝓊𝒾𝒸𝒸ℴ 𝓅𝒾𝒶𝓃𝓀 . ℰ𝒶𝒸𝒽 ℴ𝒻 𝓉𝒽ℯ 𝓋𝒶𝓇𝒾ℯ𝓉𝒾ℯ𝓈 𝒽𝒶𝓋ℯ 𝒹𝒾𝒻𝒻ℯ𝓇ℯ𝓃𝓉 ℛ𝓇𝓅𝓊𝓉𝒶𝓉𝒾ℴ𝓃 𝒾𝓃 𝓅𝒶𝓇𝓉𝒾𝒸𝓊𝓁𝒶𝓇. . (𝒴ℴ𝓊 𝓂𝒶𝓎 𝒷𝓇ℴ𝓌𝓈ℯ 𝓂𝒽 𝓁𝒾𝒸𝒽ℯ𝓈𝓈.𝒶𝒸𝒸ℴ𝓊𝓃𝓉).
Made you look. But seriously...it's time for the Tome to be revised. Who's up to bat?
https://www.youtube.com/watch?v=zs0HkEP7aJw