Dennis Callegari has been a science writer and technical writer since 1988. He is the author of Cook’s Cannon and Anchor (Kangaroo Press, 1994), and is a devotee of clerihews and h...view moreDennis Callegari has been a science writer and technical writer since 1988. He is the author of Cook’s Cannon and Anchor (Kangaroo Press, 1994), and is a devotee of clerihews and historical mysteries.view less