Whole-Wheat Potato Bread

This is the first less than excellent loaf I have made from this book. That said I am not sure if I possibly over proofed the dough? It is quite wet with the potato water plus the two cups and I had a hard time getting any gluten structure to develop. There is also a lot of yeast in this one (about 2 T.). I did like the flavor and it did come out of the oven with a nice crisp crust but it was a bit crumbly. I also feel like this recipe is a little more vague than others in the book. I may try it again with less water and less rise time.