This is 3rd year of me creating this challenge. Basically it's to incentivise you to read what you already own and as a reward buy new books. Make it what you want it to be. I will be reading 2 physical books or 10 e/audiobooks for each new book (then when I read the new book it also counts for owned TBR). 

Based on last year I know I'll need at least 100 prompts/spaces so beyond 20 I'll be adding bonus prompts throughout the year