Millie’s STEM Stories Book 1 - This illustrated book for young readers, aged 5-7, is about the importance of numbers in the daily life of a child. Millie, the pussycat, is the main character of this witty story. Older children may already know this funny black cat from her adventures in the Millie Micro Nano Pico books about quantum physics. This new series is about STEM — Science, Technology, Engineering, and Maths. If you don’t like numbers, check this book out!