The cover of the book 'Wet Flies: Tying and Fishing Soft-Hackles, Wiggles, and Fancy Nymphs' by Dave Hughes. The cover features a horizontal split with a blue background on the left and a red background on the right. In the center, there is a wooden surface with a wet fly tied on it, surrounded by various fly patterns and fishing-related items. The title of the book is prominently displayed at the top in bold white letters, and the author's name is written in smaller text at the bottom.