"Relaxation Book" is a free Android app developed by Naser Saleh, which falls under the Education & Reference category, specifically the Books subcategory. This app provides access to the "Relaxation Book" in PDF format that can be read offline without any internet connection.

The app has a simple and easy-to-use interface that allows users to browse through the pages of the book with ease. The book itself is focused on the topic of relaxation and provides helpful tips and techniques to improve one's mental health and well-being. The app is a great resource for those looking to learn more about relaxation techniques and improve their mental health.