Tuners by Aaron Frate

Being too close to the truth got Jon Xiong's mother killed. While searching for answers, a murderous cult shows up at his door. A secretive organization called the Tuners comes to his aide and teaches him about his rare ability to travel between worlds called tuning. He grapples with his new superpower and is stuck between those who would maintain order in the multiverse and those who would destroy it. Jon must avoid the same gruesome fate as his mom and figure out what happened to his family.