Although not alluded to in the title, the book "Kids, Parents, and Power Struggles" by Mary Sheedy Krucinka also addresses many sibling issues by helping families understand each other's temperament and communicate more effectively. A favorite section shows how to say or do things differently to avoid enraging others (i.e. a child who transitions easily may announce he's done playing and move on to the next game...leaving the slower-to-transition playmate in tears or outraged because there was no warning). She also offers tips to help children change their "bulldozing statements" (often button-pushing ones like "I'm not inviting you to my party!" or "Shut up!") into statements that persuade others to listen ("I didn't like what you said" or "I'd like a choice"). I'd recommend that book or "Siblings Without Rivalry" by Faber & Mizlash instead of "Beyond Sibling Rivalry".