Historian Simon Sebag Montefiore, author of weighty books on Jerusalem and Russian czars, is taking a different literary turn. He and his romantic novelist wife Santa have co-penned a children's novel called The Royal Rabbits of London, whose hero Shylo they'll be hoping joins the ranks of other legendary bunnies such as Fiver, Brer and Bugs. The film rights have been acquired by 20th Century Fox.