What's the Name of That Book??? discussion

Elementary book or series. College aged kids stranded in the desert with monkeys that chase them and poison berries. Ground drops out from under them. There is some water but they don’t want to go too deep. End up in abandoned government lab.

They find a lost city and that is where they end up in the abandoned government lab

Kalahari by Jessica Khoury? If not, when did you read your book?

The Testing?

Here's the Google Books preview of Kalahari by Jessica Khoury - Angela's suggestion:

https://books.google.com/books?id=nIR... There are different cover images.

The hunger games series?

Is the 100?

"Elementary book or series" - what does that mean? Because the age level seems to be college/YA?