I found some sources that provide excellent books about cryptocurrencies in Arabic. Here is a list of some books you may find useful:

1. **Mastering Bitcoin** by Andreas Antonopoulos - This book is a useful introductory reference on the concept of decentralized currency¹.

2. **Cryptoassets** by Chris Burnicek and Jack Tatter - This book explores cryptocurrencies, tokens, and related assets¹.

3. **The Book Of Satoshi** by Phil Champagne - delves into the mystery behind Bitcoin's creator, Satoshi Nakamoto¹.

4. **“Cryptocurrency”** by Abraham K. White – is about mining, investing and trading in cryptocurrencies¹.

5. **The Truth About Crypto** by Rick Edelman - answers the most frequently asked questions about cryptocurrencies².

6. **“Crypto Investing Guide”** by Ian Ballina - Provides a complete and detailed guide to the basics of investing in cryptocurrencies².