Souls amid the Ether — Jennifer San Filippo

Natalie's family has a duty.Rips in reality sometimes bring XDs to their universe—mind-bending creatures whose very presence could unwind existence itself. It's Natalie's job to hunt these monsters down and capture them, alive or otherwise.But when Natalie's mother reveals a startling truth about XDs, Natalie can't help but wonder if it has something to do with her brother's disappearance years ago. With no one to rely on but herself, Natalie must brave a space between spacetime to find out exactly what happened.