Lousy grammar and sloppy editing. It could have done with a major overhaul.
I wasn't too keen on the every other chapter, now and then, set up. I was afraid there'd be too much focus on the past and we wouldn't get a full picture in the present. That fortunately wasn't the case.
I did feel that we could have used a few more scenes between the boys though. I felt that there were missing moments where explanations could have been made from Axel. Sadly the lacking explanations made Ben look somewhat dense and naive.
It would also have been very nice to read some scenes in between the last chapter and the epilogue, it felt rushed and not cleared up enough.