Duck! is, hands down, one of the sweetest and most insightful explorations of 24/7 total power exchange that I have ever read. It's also one of the most highly recommended books I've ever read, and though I didn't quite understand why at the beginning, it was perfectly clear by the end. 
 There are a lot of amazing things about this book. First and foremost is the way the TPE relationship is handled--how it begins, how it develops, how it ends, and most especially the thought processes of both the Dom and the sub. The two POVs complimented each other to perfection in this book, soothing any--ahem--ruffled feathers the reader might ever have about their situation. Not, mind you, that I think that will come up often; Dare sets the stage with so much patience and reflection that even an uninitiated reader with no understanding of what drives Doms and subs would likely find themselves nodding their heads and saying, "Ooooh, I get it now." That's quite the accomplishment. 
 Another tick in the "quite the accomplishment" column was Dare's concept of avian shifters. Truly creative, and the hierarchy amongst them felt natural, borrowed neatly as it was from real life. There was some uneasiness about this in the beginning when poor Ori is still in the Nest, before he's discovered by his new master, but once he's in his master's hands, the picture of the world Dare painted becomes clear and even kind of reassuring. 
 So, why not five stars? Two big things. First, the writing's a little rough. Tons of misplaced commas--and not so much proofing errors as grammar errors--that often threw off the rhythm of a sentence or a scene. Also an absolutely endless use of epithets ("the younger man," "the older man," "the bigger man," "the smaller man," "the hawk," "the duckling," "the submissive," and on and on and ON), a dozen or more on the average page, sometimes two or three in a single sentence! My guess is that this stemmed from the author either worrying about repeating the characters' names too often (which is silly, names are as invisible on the page as "said"), and/or from her being unsure of how to handle pronouns in an M/M story without confusing the reader (which is admittedly not easy but still something I expect a published author to manage). One or two epithets a paragraph is usually enough to make my eye twitch, so this was pretty tough for me to get over and definitely took away from my enjoyment of the story. 
 The other issue was the pacing in the middle third of the book. The first third of the book had a strong hook, drew me right in, made me care intensely about Ori and his master and want to know everything I possibly could about the brilliant world Dare created. The last third was heartbreaking, sad, sweet, beautiful, engrossing . . . I seriously lack the adjectives to describe how compelling and wonderful and emotional the last third of this book was, or how satisfying the ending was. But the middle third (after Ori had settled into his master's home but before he completes his full shift) really began to drag, enough that I began to think about not finishing. If you find yourself in the same position--STICK IT OUT! The last third of the book will carry you away, keep you up half the night, and you'll be glad for every second of lost sleep because it meant you got to read act 3. 
 So, this one's a definite "recommend" for me--READ IT!--and I'm looking forward to picking up the next Kim Dare book in my TBR :)