Pentominos are shapes made up of five squares and belong to the larger family of polyominoes. Recently, they have become a popular topic within recreational mathematics literature. The authors also provide compelling reasons for their use in mathematics education, including the fact that pentominos are an extremely versatile learning material that can help achieve numerous educational goals. This book introduces the fascinating world of pentominos through seven chapters that increase in difficulty. The exercise pages of the book are designed to be immediately usable as ready-to-copy worksheets; the provided grids serve as a drawing aid for found solutions. The solutions section of the book thoroughly addresses all questions from the exercise section. A copy template of the pentomino shapes at the end of the book makes it possible.