I know that back when Booster Gold had the Jaime Reyes Blue Beetle back up stories they were edited into their own TPB. Up until now I've either seen the back up split up from the main book in trades or all the back ups combined into the back of the TPBs. What did Marvel do? They put the Spider Island and Spider-girl stories back to back like they were issue to issue.
Meaning you have to read Spider Island then Spider-Girl back again and again instead of simply separating the two. Why is it put together this way?