It is due out on Sept 4, 2018 from Sterling Children's Books. Here's the description (from Amazon):
Welcome to Nowhere, Arizona, the least livable town in the United States. For Gus, a bright 13-year-old with dreams of getting out and going to college, life there is made even worse by Bo Taylor, Nowhere’s biggest, baddest bully. When Bo tries to force Gus to eat a dangerously spiny cactus, Rossi Scott, one of the best racers in Nowhere, comes to his rescue—but in return she has to give Bo her prized dirt bike. Determined to buy it back, Gus agrees to go searching for gold in Dead Frenchman Mine, joined by his old friends Jessie Navarro and Matthew Dufort, and Rossi herself. As they hunt for treasure, narrowly surviving everything from cave-ins to mountain lions, they bond over shared stories of how hard life in Nowhere is—and they realize this adventure just may be their way out. Author Dusti Bowling (Insignificant Events in the Life of a Cactus) returns to the desert to create a gripping story about friendship, hope, and finding the power we all have within ourselves.
The description doesn't say that Rossi is Tohono O'odham, but the reviews do. The reviewer at Kirkus, said this:
Although Gus is careful to point out that Rossi is Tohono O’odham, and later Rossi reveals some factoids about her heritage, his fascination with her dark ponytail and her general inscrutability reinforce stereotypes—as does the obviousness of the setup.
On the Edelweiss site, I am able to see the first pages. The main character, Gus, is being held down by the bully, Bo and his sidekicks, Jacob and Matthew (p. 3-4):
"Let him go, Bo," a voice said from behind me. Not just any voice--an unusually deep, raspy voice. A voice I would recognize anywhere.
"Go away, Rossi. This doesn't concern you," Bo said.
"Yeah, this doesn't concern you." Matthew echoed Bo.
"Yes, it does," Rossi said. "You're angry I beat you again this morning, so you're taking it out on someone smaller and weaker than you. You're pathetic."
I pursed my lips. "Not that much small and weaker," I muttered.
"You're pathetic," Bo said. "Why don't you do us all a favor and go back to Mexico?"
I gritted my teeth. I tried to turn my head out of his grasp, but he gripped my hair tighter.
"Are you for real?" Rossie said. "You do realize not all brown people are Mexican, don't you?"
"Oh, excuse me," Bo crooned. "Then go back to the reservation."
"Yeah, go back to the Navajos," Jacob added, and I heard him and Matthew snicker together. What a couple of suck-ups.
I ground my teeth so hard, it was a wonder they hadn't already turned to dust like everything else around us. "She's Tohono O'odham, not Navajo," I grumbled.Those opening lines... "go back to Mexico" and "go back to the reservation" are spoken by bullies. We're not supposed to like those guys. In a way, they're a modern form of Mrs. Scott, in Little House on the Prairie, saying "the only good Indian is a dead Indian."
With the "go back to Mexico" line, Bowling (the author) is clearly playing on present-day politics and the hate that the current US president has emboldened in so many people. But does it work? If you happen to be Native, or if you happen to have roots or family in Mexico, those lines may sting.
I am also curious about the mine the characters go into. How is that mine presented?
When the teens are trapped in that mine and talk about their worst day ever, what does the Native character talk about? What about Jessi, who is Mexican American?
I've requested a copy of the book. If I get it, I'll be back with my thoughts on it.