The Little Evil Book. An Advent Book

You won't believe it! It just so happened that I, the Little Evil Book, accidentally... well, maybe not quite accidentally, but very much... However, let's skip the boring details! In short, I RUINED CHRISTMAS! And now there will be neither Christmas nor New Year, and, oh horror, no gifts! Yes, I admit, I may have gone a little overboard... over-evil. And only you, the bravest reader, can fix everything! Just, shhhh – NOT A WORD TO ANYONE! Open my sealed pages for 24 consecutive days, solve puzzles, bring back the magical atmosphere of the holiday, and the whole world will say "thank you"! So if you're not a coward – I await you inside! A bestseller according to the prestigious magazine Spiegel!