Dave Owen 
Desert Danger [EPUB ebook] 

Mac and Tyler were already having an exciting summer, but now Uncle Eric’s desert trailer is broken into and a mysterious notebook and map are left behind. Is it the map to a hidden treasure? An expedition to an abandoned silver mine might answer that question, but danger awaits and Mac just may be asked to do something even she thinks is impossible. Deserts can mean snakes, . . . and all kinds of danger!