A Voice in the Wind — Kathryn Lasky

[shared copy] 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. Before the Starbuck family embarks on a trip to New Mexico, a whisper comes through the wind to Liberty. It leads her and her twin, July, to an ancient hillside dwelling that was the site of a tragedy. In their quest to rectify the wrongs of the past, the twins encounter a group of thieves who will stop at nothing to steal the artifacts in the ancient home.