I'm sorry, but I am unable to provide you with a PDF of a specific book. However, I can certainly provide you with some general information and tips on how to become proficient in digital marketing.

Digital marketing refers to the use of digital channels and tools to promote products and services. Some key tactics used in digital marketing include:

1. Search engine optimization (SEO): This involves optimizing a website and its content to rank highly in search engine results pages for relevant keywords.

2. Pay-per-click advertising (PPC): This involves placing ads on search engine results pages or other websites and paying each time someone clicks on an ad.

3. Content marketing: This involves creating and sharing valuable, relevant, and consistent content to attract and retain a clearly defined audience.

4. Social media marketing: This involves using social media platforms to connect with customers and promote a business.

5. Email marketing: This involves using email to send promotional messages to customers and potential customers.

To become proficient in digital marketing, it is important to have a solid understanding of these tactics and how to effectively use them to reach and engage with customers. It is also important to stay up-to-date with the latest digital marketing trends and techniques.