1. Doctor of Mathematics: This book introduces the basic concepts and principles of mathematics in an interesting way, and helps primary school students understand the importance and application of mathematics through interesting stories and examples.

2. The story of mathematics: This book tells the history and development of mathematics with vivid language and illustrations, so that primary school students can understand the origin and evolution of mathematics.

3. Happiness of Mathematics: This book stimulates primary school students' interest in mathematics through games and puzzles, so that they can learn mathematics knowledge while playing.

4. The Secret of Mathematics: This book introduces some interesting and magical phenomena in mathematics in an exploratory way, such as Rubik's Cube and Rubik's Cube, which makes primary school students curious about mathematics.

5. The Magic of Mathematics: This book shows the magic of mathematics through the combination of magic and mathematics, so that primary school students can understand the application of mathematics while enjoying magic.

6. Mathematical Adventure: This book leads pupils to explore the mathematical world, solve various mathematical problems and cultivate their logical thinking and problem-solving ability in the form of adventure stories.

7. The miracle of mathematics: This book shows the application of mathematics in real life, such as finance, engineering and other fields, so that primary school students can realize the importance and practicability of mathematics.

With easy-to-understand language and vivid and interesting contents, these books help primary school students to build their interest and understanding of mathematics and stimulate their thinking ability and creativity.