如果你打算用英语标题的话，我觉得用 The Secret of words 比 Secrets of words 好。

 

民 - 為什麼人民/people以le結尾？ 我的一孔之見將出現在本人的書“單字的秘密”裡。希望它會得到熱烈歡迎。”如下说要易懂一些：

Why does the word "people" end in the letter "e?" My personal perception of it will be elaborated in my new book entitled "The Secret of Words." Hopefully, this book will be received well.

请原谅我的唐突。忘你的新书早日面世并引起关注！