If you like The Girlfriend, by R.L. Stine for its horror, suspense, and descriptive writing, you may like these books:
A Ghost In The Family,by Betty Ren Wright.
While visiting his friend Jeannie's eccentric Aunt Rosebud in a boarding house that may be haunted, ten-year-old Chad comes across a mystery involving a missing diamond bracelet.
Here are some books similar to What Every Girl (Except Me) Knows! Some classics that you might have missed, as well as some newer titles that are sure to grab you!
I Am the Wallpaper, by Mark Peter Hughes.
Thirteen-year-old Floey Packer, jealous of her attractive and popular older sister, shares her home with two younger cousins and experiences a summer vacation filled with embarrassing events, with herself as the star.