Mental Mosaics is a collection of 200 unique puzzles and challenges on an eclectic range of subjects, including clocks and calendars, liars, demons, chess boards, rotatable words, and hidden infinities. Each chapter is a self-contained unit that focuses on its own unique subject, starts with one or two simple puzzles to set the tone, progresses to a number of moderately difficult puzzles, and concludes with a small number of highly difficult puzzles to test your mastery. This book includes 184 novel puzzles created by the author, Brandon Quinn, and ends with 16 puzzles that are famous across the world, concluding with The Hardest Logic Puzzle Ever.