Update docs

Author: hwdsl2

README-ja.md

@@ -10,7 +10,7 @@ IPsec VPNはネットワークトラフィックを暗号化し、インター
 
 IPsecサーバーとして[Libreswan](https://libreswan.org/)を使用し、L2TPプロバイダーとして[xl2tpd](https://github.com/xelerance/xl2tpd)を使用します。
 
-**[» :book: 本: VPNサーバーの構築方法](docs/vpn-book.md)** [[日本語](https://books2read.com/vpnguideja?store=amazon) | [English](https://books2read.com/vpnguide?store=amazon) | [中文](https://books2read.com/vpnguidezh) | [Español](https://books2read.com/vpnguidees?store=amazon) | [Deutsch](https://books2read.com/vpnguidede?store=amazon) | [Français](https://books2read.com/vpnguidefr?store=amazon) | [Italiano](https://books2read.com/vpnguideit?store=amazon)]
+**[» :book: 本: VPNサーバーの構築方法](docs/vpn-book.md)**
 
 ## クイックスタート
 

README-zh.md

@@ -10,7 +10,7 @@ IPsec VPN 可以加密你的网络流量，以防止在通过因特网传送时
 
 我们将使用 [Libreswan](https://libreswan.org/) 作为 IPsec 服务器，以及 [xl2tpd](https://github.com/xelerance/xl2tpd) 作为 L2TP 提供者。
 
-**[» :book: Book: 搭建自己的 VPN 服务器分步指南](docs/vpn-book-zh.md)** [[中文](https://books2read.com/vpnguidezh) | [English](https://books2read.com/vpnguide?store=amazon) | [Español](https://books2read.com/vpnguidees?store=amazon) | [Deutsch](https://books2read.com/vpnguidede?store=amazon) | [Français](https://books2read.com/vpnguidefr?store=amazon) | [Italiano](https://books2read.com/vpnguideit?store=amazon) | [日本語](https://books2read.com/vpnguideja?store=amazon)]
+**[» :book: Book: 搭建自己的 VPN 服务器分步指南](docs/vpn-book-zh.md)**
 
 ## 快速开始
 

README.md

@@ -10,7 +10,7 @@ An IPsec VPN encrypts your network traffic, so that nobody between you and the V
 
 We will use [Libreswan](https://libreswan.org/) as the IPsec server, and [xl2tpd](https://github.com/xelerance/xl2tpd) as the L2TP provider.
 
-**[» :book: Book: Build Your Own VPN Server](docs/vpn-book.md)** [[English](https://books2read.com/vpnguide?store=amazon) | [中文](https://books2read.com/vpnguidezh) | [Español](https://books2read.com/vpnguidees?store=amazon) | [Deutsch](https://books2read.com/vpnguidede?store=amazon) | [Français](https://books2read.com/vpnguidefr?store=amazon) | [Italiano](https://books2read.com/vpnguideit?store=amazon) | [日本語](https://books2read.com/vpnguideja?store=amazon)]
+**[» :book: Book: Build Your Own VPN Server: A Step by Step Guide](docs/vpn-book.md)**
 
 ## Quick start
 

docs/vpn-book-zh.md

@@ -1,5 +1,9 @@
 [« 返回主页](../README-zh.md) | [English](vpn-book.md) | [中文](vpn-book-zh.md)
 
+## 新书：Privacy in the Age of AI
+
+了解如何在人工智能时代构建更高级别的隐私保护。在 [Amazon](https://books2read.com/privacy?store=amazon) 上提供本书的英文版。
+
 ## 搭建自己的 VPN 服务器分步指南
 
 本书是搭建你自己的 IPsec VPN, OpenVPN 和 WireGuard 服务器的**分步指南**。在 [Amazon](https://books2read.com/vpnguidezh?store=amazon)、[Google Play](https://books2read.com/vpnguidezh?store=google) 和 [Apple Books](https://books2read.com/vpnguidezh?store=apple) 上提供电子书、平装本和有声读物格式。

docs/vpn-book.md

@@ -1,5 +1,9 @@
 [« Back to home page](../README.md) | [English](vpn-book.md) | [中文](vpn-book-zh.md)
 
+## New book: Privacy in the Age of AI
+
+Learn how to build your next-level privacy in the age of AI. [Available on Amazon](https://books2read.com/privacy?store=amazon).
+
 ## Build Your Own VPN Server: A Step by Step Guide
 
 This book is a **step-by-step guide** to building your own IPsec VPN, OpenVPN and WireGuard server. Available on [Amazon](https://books2read.com/vpnguide?store=amazon), [Google Play](https://books2read.com/vpnguide?store=google) and [Apple Books](https://books2read.com/vpnguide?store=apple) in eBook, paperback and audiobook formats.