diff --git a/docs/chapter_preface/about_the_book.md b/docs/chapter_preface/about_the_book.md
index d1b27ed6d..afd87ae46 100644
--- a/docs/chapter_preface/about_the_book.md
+++ b/docs/chapter_preface/about_the_book.md
@@ -42,6 +42,8 @@ comments: true
 
 本书的繁体中文版由 Shyam-Chen 和 Dr-XYZ 审阅，英文版由 yuelinxin、K3v123、QiLOL、Phoenix0415、SamJin98、yanedie、RafaelCaso、pengchzn、thomasq0 和 magentaqin 审阅。正是因为他们的持续贡献，这本书才能够服务于更广泛的读者群体，感谢他们。
 
+本书的 ePub 电子书生成工具由 zhongfq 开发。感谢他的贡献，为读者提供了更加自由的阅读方式。
+
 在本书的创作过程中，我得到了许多人的帮助。
 
 - 感谢我在公司的导师李汐博士，在一次畅谈中你鼓励我“快行动起来”，坚定了我写这本书的决心；
diff --git a/en/docs/chapter_preface/about_the_book.md b/en/docs/chapter_preface/about_the_book.md
index ffb806820..45c8dcf74 100644
--- a/en/docs/chapter_preface/about_the_book.md
+++ b/en/docs/chapter_preface/about_the_book.md
@@ -42,6 +42,8 @@ The code review work for this book was completed by coderonion, curtishd, Gonglj
 
 The Traditional Chinese version of this book was reviewed by Shyam-Chen and Dr-XYZ, and the English version was reviewed by yuelinxin, K3v123, QiLOL, Phoenix0415, SamJin98, yanedie, RafaelCaso, pengchzn, thomasq0 and magentaqin. It is because of their continuous contributions that this book can serve a wider readership, and we thank them.
 
+The ePub ebook generation tool for this book was developed by zhongfq. We thank him for his contribution, which provides readers with a more flexible way to read.
+
 During the creation of this book, I received help from many people.
 
 - Thanks to my mentor at the company, Dr. Li Xi, who encouraged me to "take action quickly" during a conversation, strengthening my determination to write this book;
diff --git a/zh-Hant/docs/chapter_preface/about_the_book.md b/zh-Hant/docs/chapter_preface/about_the_book.md
index 11b9235d6..6b84c47e6 100644
--- a/zh-Hant/docs/chapter_preface/about_the_book.md
+++ b/zh-Hant/docs/chapter_preface/about_the_book.md
@@ -42,6 +42,8 @@ comments: true
 
 本書的繁體中文版由 Shyam-Chen 和 Dr-XYZ 審閱，英文版由 yuelinxin、K3v123、QiLOL、Phoenix0415、SamJin98、yanedie、RafaelCaso、pengchzn、thomasq0 和 magentaqin 審閱。正是因為他們的持續貢獻，這本書才能夠服務於更廣泛的讀者群體，感謝他們。
 
+本書的 ePub 電子書生成工具由 zhongfq 開發。感謝他的貢獻，為讀者提供了更加自由的閱讀方式。
+
 在本書的創作過程中，我得到了許多人的幫助。
 
 - 感謝我在公司的導師李汐博士，在一次暢談中你鼓勵我“快行動起來”，堅定了我寫這本書的決心；