Moderately fun, but the characters could be named Jared, Ivanka, and Don Jr. as far as any historical sense of children at the time. (They do spot a guy who has a passing resemblance to Steve Bannon, and foil his nefarious plot to take down Caesar). Since this is book 4, there's probably been some character development (and a chance for the characters to have a sense of entitlement) up to now, but when the girl gets bored on a 2 week trip in a ship with Caesar and Cleopatra, I just don't feel her pain.
