I'm designing a set of bookcases to be built out of pine using primarily hand tool techniques. I'm planning on dadoing the shelves into the verticals, but dadoes obviously provide little resistance against tension. Does anyone have suggestions for how to join the corners of the carcass to resist horizontal strains and pullout from the books on the shelves? Sliding dovetails appeal, but I'm not entirely confident in my ability to execute them well. Dovetails at the top corners are the obvious option there, but that leaves the bottom corners in need of a solution.