How about whenever you bring up a title in the search, there's a button there with "Add this to my pull list" with maybe a ? button to explain what that means.
And then like you said, all titles go into a new pile "Pulled list" where you can easily add them all, or maybe make an option .... check a box so they automatically go into your collection. When you pick "Add this title to my pull list", have an option to tell it what pile to put them to in case it's a new title. If it's old I assume it would go wherever the previous ones are.
Yeah, it would all be options. Just like selecting what title, variants, etc. You could add "Detailed list" or "Cover pics?" etc. Or even Detailed Lists could have a sub menu like "About" " .... not sure if you'd want anything else though, like characters. So maybe no sub menu.
Actually, instead of a report it would be great to see this in graph form. Then you could see the pits in a long run easier.