Update README.md

Author: skydoves

README.md

@@ -40,6 +40,14 @@ In this multipart series, you'll learn all about the Android development ecosyst
 
 If you'd like to get notified as we release future posts, join the **[watchers](https://github.com/skydoves/android-developer-roadmap/watchers)** on GitHub or follow **[Stream](https://twitter.com/getstream_io)** on Twitter. You can also follow the __[author](https://github.com/skydoves)__ of this repository on GitHub.
 
+<a href="https://github.com/doveletter">
+<img src="https://github.com/user-attachments/assets/b1c938ec-1bfa-4e01-9c81-bcd67f926f63" width="13%" align="right"/>
+</a>
+
+## 🕊️ Dove Letter
+
+If you're eager to dive deeper into Kotlin and Android, explore [Dove Letter](https://github.com/doveletter/dove-letter), a private subscription repository where you can learn, discuss, and share knowledge. To get more details about this unique opportunity, check out the [Learn Kotlin and Android With Dove Letter](https://medium.com/@skydoves/learn-kotlin-and-android-with-dove-letter-26265da11903) article.
+
 <a href="https://getstream.io/tutorials/android-chat?utm_source=Github&utm_medium=Jaewoong_OSS&utm_content=Developer&utm_campaign=2022AndroidDeveloperRoadmap&utm_term=DevRelOss">
 <img src="https://user-images.githubusercontent.com/24237865/138428440-b92e5fb7-89f8-41aa-96b1-71a5486c5849.png" align="right" width="12%"/>
 </a>