The Little Book of Network Security and Data Protection is a free eBook that I wrote as part of the company's (Modern Networks) ongoing work to raise awareness of cyber security threats and data protection challenges, such as GDPR. The eBook was written mainly for existing clients i.e. commercial properties and medium sized businesses. Hard copies of the book have been distributed at a number of cyber security events we have held for senior managers of leading commercial property firms. Our account managers distribute the book during client visits. The eBook is also available as a free PDF download from the company's website. The book itself is 50-pages, divided into nine chapters that cover everything from cyber security policies and user awareness training to patch management and backup. At the end of each chapter we offer three top tips that any organisation can implement quickly to improve their cyber security. The book has proved popular as an educational piece. It has also helped generate new business for the company's Network Security Audits and remedial IT work (fixing security vulnerabilities).