All We Leave Behind — Benjamin X. Wretlind

Following the exodus from rising floodwaters, the surviving descendants of those who came to create a society on a planet far from Earth have struggled to rebuild within the remains of an ancient temple. Now, as disease and an unfamiliar environment threaten to destroy them yet again, everyone seems to have an opinion about what to do next. From that conflict, three fractured groups of colonists emerge.Miriam and Tobias Page, newly married, believe there may be a possible home beyond a distant canyon. Their journey with a quarter of the population doesn't start off easy and soon nature and their own humanity will conspire to end it all. Meanwhile, Miriam's two cousins, Joel and Micah, have different ideas. Joel is convinced the best course of action is to return to the mountains they left and mine for the ore that would make a great return to Earth possible. Micah hopes to stay, learn all he can about the temple's previous occupants, and prove both of them wrong. But soon, he and his new partner Patience realize that no option is truly safe.As the transits of three different groups get underway, new dangers and surprises emerge from within the rainforests, mountains, and deserts of the new planet...and one of those may have followed them from Earth. While a final home is a dream away, the present nightmares must be dealt with first if any of them are going to survive.