1. Two physical books that you already own in January

2. Two physical books that you already own in February

3. Two physical books that you already own in March

4. Two physical books that you already own in April

5. Two physical books that you already own in May

6. Two physical books that you already own in June

7. Two physical books that you already own in July

8. Two physical books that you already own in August

9. Two physical books that you already own in September

10. Two physical books that you already own in October