Nina Soni, Former Best Friend (Peachtree Publishing) – by Kashmira Sheth, with illustrations by Jenn Kocsmiersky. Just in time for the holiday season, the Atlanta-based publisher has brought out a new book for the 7-10 age group. Although Nina, a math buff, is fond of making lists, she forgets that her science project is due soon. Alexander Fleming, known for discovering penicillin, comes to the rescue. Another inspiration for Nina comes in the form of her mom’s stuffed eggpl