The model for all high fantasy is obviously professor Tolkien's The Lord of the Rings, but what was necessary then, to publish in three volumes thanks to his glacial and revisionist writing style or the rationing of paper, shouldn't mean that every fantasy quest needs to be broken into three. in fact, there seem to be more and more 'duologies' being published lately, which makes sense if you are using the Hero's Journey as a model: the first book ends on a low so that the second and final book can end on a high. For a trilogy, the middle one needs to end on a low, but so does the first one, or you don't have a second book; or you do what Tolkien did and end on a new start, with the titular Fellowship riven, with death at their heels. In the third and final part of the Glacian Trilogy, Dawsyn and Ryon (why? Terrible names) are leading the remains of the Ledge-dwellers through the Chasm to look for the promised valley. I write these words having not read the first two books as this part of the book is clear. What isn't at all clear are the one note scenes with the two Queens and then a major section that focuses on one of the main supporting cast but with all revelations laid bare, which could have resonated more strongly with the theme of parents and children that threads throughout. Structurally, this book is a mess, less a novel than a series of things thrown at walls to see what sticks. Major enemies and plotters are dispatched off-page or offhandedly, offering no scene or act turns. The complexity of Dawsyn and her family history is the only interesting note, which makes the lack of development of other characters and acting uncharacteristically harder to ignore. And there are plenty of missed opportunities to develop Dawsyn, even in a third and final book, so the sudden ending is like being thrown off a cliff face as some characters are, with an epilogue in a (welcome) wry and knowing style that has no relationship to anything previously. A flawed three stars.