Never a Hero by Vanessa Len

Despite all of the odds, Joan achieved the impossible. She reset the timeline, saved her family – and destroyed the hero, Nick. But her success has come at a terrible cost. She alone remembers what happened. Now, Aaron, her hard-won friend – and maybe more – is an enemy, trying to kill her. And Nick, the boy she loved, is a stranger who doesn’t even know her name. Only Joan remembers that there is a ruthless and dangerous enemy still out there. When a deadly attack forces Joan back into the monster world as a fugitive, she finds herself on the run with Nick as Aaron close… Read more.