本套書包含以下兩本知識翻翻書：

1. 《What are stars?》

　　星星在夜空中一閃一閃眨眼睛，閃閃發亮，孩子可能會問：「星星是什麼形狀呢？」「天空上有幾顆星星？」「星星在天空中排列出好多形狀，那裡看起來好像一隻牛，是嗎？」書中每一頁都有諸如此類的提問，只要掀開書中超過30個翻翻頁，就可以知道每一個問題的答案，還可以引導孩子思考與答案有關的其他問題，寓教於樂。
 

2. 《What is the moon? 》

　　邀讀者一同探索神秘富魅力的月亮！月兒有時圓、有時缺，是怎麼改變形狀的呢？月亮有什麼秘密？太空人登月，找到了什麼？透過Q & A和翻翻頁的形式，大、小讀者可以手腦並用、一起互動學習。在人類登陸月球50週年的現在閱讀此書，意義非凡。

　　What are Stars? They twinkle in the night sky, but what exactly are stars? Which one’s the nearest? Can humans visit a star? Curious little children can lift over 30 flaps to find the answers to these questions and many more in this delightful introduction to stars and the night sky, with simple explanations and gorgeous illustrations on every page.
 
　　What is the moon? Explore the magic and mystery of the moon, from why it changes shape and what makes it shine to how astronauts managed to land on it and what they found there. 50 years after the first Moon Landing, this delightful book makes a perfect introduction to the topic for a new generation.