Sunday is fun day with these 72 medium-difficulty puzzles, featuring fun facts in the answer section.

If you’ve got a sharp pencil and a sharp mind, you’ll love solving these super Sunday-sized crosswords. Originally appearing in the Long Island newspaper Newsday, they were crafted by an all-star lineup of constructors and edited by puzzle expert Stanley Newman. Each puzzle features a fabulous theme-including Dickens, Frosty the Snowman, the Chinese zodiac, and US presidents-and every clue has been vetted for accuracy. Fun facts in the back of the book shed light on select answers.