I've read 40% of At Attention

At Attention - Annabeth Albert

"And we can't make the same mistake twice."

Dylan's chest gave him an unhappy twinge. He shouldn't be surprised or hurt that Apollo called him a mistake. Of course, Apollo was going to have serious guilt and feels. But still, he hated that one of the single hottest moments of his life was reduced to a mistake

 

Apollo is still being kind of a dick.