Oasis

"Alif had exciting summer plans: working on her father's archaeological dig site in the desert with four close friends . . . and a very cute research assistant. Then the sandstorm hit. Their camp wiped away, Alif and the others find themselves lost on the sands, seemingly doomed . . . until they find the oasis. It has everything they need: food, water, and shade--and mysterious ruins that hide a deadly secret. As reality begins to shift around them, they question what's real and what's a mirage. The answers turn Alif and her friends against each other, and they begin to wonder if they've truly been saved"--OCLC.