Starbuck Twins

The Starbuck family is anything but ordinary. There are two sets of Starbuck twins: preteens Liberty and July, and their little sisters Charly and Molly. But even more extraordinary is the fact that all four children have the ability to teleflash—they can talk to each other without saying a word! It's a power that comes in handy whenever these adventurous kids are on the trail of a villian.

This series of mysteries, originally written by Kathryn Lasky in the early 1990s but recently reissued, are intended for readers aged 9 to 12.