The excerpt begins
Caleb doesn't actually remember how he ended up coming home with Jason. He remembers going to Jason's concert alone after Damian broke up with him.I continue reading, I don't know what the problem is, but for some reason it's the reading equivalent of trying to swim through treacle. Then I realize - this is written in the present tense.
I don't know why but I struggle to read present tense. I find it hard going.
Maybe, it's because growing up all the stories you hear as a child are past tense - "Once upon a time there was a..." Maybe it's the difficulty of getting your brain to assimilate a story that is happening THIS INSTANT.
I've found I can take it in very small doses where it's used mainly for effect, for example in the prologue of Bitten by Kelley Armstrong. For me as far as present tense is concerned it's a question of less is more.