Someday is now. That’s attorney Ruth Kaufman’s motto, but ironically, her “now” is 1453, Henry VI is king, and what we now call the Wars of the Roses will soon begin. The king sends Sir Nicholas Gray to protect the recently widowed lady Amice Winfield from undesirable suitors. Though Nicholas is intrigued by her (and she by him), Lady Amice yearns to run Castle Rising without a man’s control. “At His Command,” winner of the 2011 Romance Writers of America’s …