- Dean RiversConundrums, Riddles and Puzzles Containing one thousand of the latest and best conundrums, gathered from every conceivable source, and comprising many that are entirely new and original Düğüm, Bilmece ve Bulmacalar: Bin Tane En Son ve En İyi Bilmece İçeren, Her Türlü Kaynaktan Toplanmış ve Tamamen Yeni ve Orijinal Olan Birçok Bilmeceyi İçeren Kitap