Readers, I hope you've read the Trixie Belden books for girls. If you haven't you're really missing out. I bought my first Trixie Belden book when I was in the fourth grade. I paid a whopping $.69 for it at a discount store. I'd read about three pages before it hooked me, and the pages had big print. This series was perfect for a girl. Trixie the heroine was an amateur detective whom no bad guy could defeat. She was fun, fiesty, and had a very understanding mother and father. She and her friends belonged to a club called the Bob Whites. If one of them was in trouble they'd whistle like a Bob White, and the rest of them would come running.
Trixie's sidekick was a wealthy young lady named Honey Wheeler. Honey had good parents who didn't mind loaning their horses, swimming pool, travel trailer, or anything else so Honey and Trixie could have adventures. Honey wasn't as adventuresome as Trixie, but she faithfully backed up her friend no matter what Trixie got them into. And there is the little matter of Honey's adopted brother Jim. He and Trixie like each other.
If you'd like to get your daughter started on the series, start with the first one and work your way through. The Secret of the Mansion is the first book, and it's where Trixie and Honey meet and find Jim. Hey, you may like them yourself.