For this part, you are supposed to write a Lost Announcement in English in 100-120 words based on the following situation. Remember to write it clearly.
你(Li Yuan)丢失了一本书。写一篇失物启事。启事内容如下：
(1)书名；
(2)丢书的地点、时间；
(3)书对你的重要性；
(4)联系方式。