How do I add a book to my stats (and goal)?

To be counted towards your stats (yearly or all-time), a book must have a finished date added. If you navigate to your finished list you'll be able to add finish dates to the books you've read. Updating the date here should add the book to your stats.

If you have a reading goal for the year you've indicated the book was read, you will also see the book added towards your goal.

Please note, once you add a finished date, your yearly stats update immediately, while the all-time stats update after a few days.