I don't know if this has been added before but I couldn't find it if it has.

I would love an option to set the number of books that needs to be read for a certain prompt before it is marked as "complete".

At the moment you can add multiple books but you only have to read 1 for it to be marked complete. I would love to be able to set up challenges that have prompts like "read 5 classics" or "read 2 fantasy books" but the only way to do this at the moment would be (as far as I'm aware) set up a different reading challenge for each prompt or insert multiple of the same prompt into the reading challenge.

I envision this as an extra button that says "How many books to be complete?" maybe when setting up the prompt (near where the current "bonus book" option is perhaps).