housekeeper. She's like the absentminded professor in that old movie. Then there are Jessi Ramsey and Mallory Pike, junior officers in the club. Jessi and Mal are best friends. They're also sixth-graders, while the rest of us are eighth-graders. We all go to Stoneybrook Middle School. Mal and Jessi are both the oldest kids in their families, both love horses, both love to read, both think their parents treat them like infants -- even though recently they were allowed to get their ears pierced (just one hole in each ear, of course) -- and neither one of them has ever had a boyfriend. But the similarities end there. Mal comes from a huge family (she has seven younger brothers and sisters), while Jessi comes from an average-sized family -- one younger sister and a baby brother. Mal wants to be an author