Quality of Life Updates

I’ve recently made a number of improvements to the database here.

• I’ve added links now to IST in addition to Bookshop.
• There are now separate columns for Diamond Codes and ISBNs for books.
• I’ve been informed that as Diamond will still be delivering DC internationally, there will still be Diamond codes and I’ve updated all the future DC books that have them.
• A large number of new Marvel and DC books have been found/shared for next year. Thanks to Omar and Near Mint Condition for dropping all the details for Marvel early in his videos (here and here).