Here are some of the best content marketing books:

1. "Content Inc." by Joe Pulizzi
   Focuses on building a content-driven business, starting with an audience-first approach and turning content into revenue.


2. "Everybody Writes" by Ann Handley
   A guide to writing content that engages and converts, perfect for improving your writing skills for digital marketing.


3. "Made to Stick" by Chip Heath & Dan Heath
   Explains why some ideas stick and others don’t, providing valuable insights into creating content that resonates and is memorable.


4. "Content Strategy for the Web" by Kristina Halvorson & Melissa Rach
   A deep dive into creating a successful content strategy, helping you organize and optimize content for maximum impact.


5. "Killing Marketing" by Joe Pulizzi & Robert Rose
   Explores how businesses can use content marketing to drive growth and rethink traditional marketing models.

These books cover everything from crafting compelling content to building long-term strategies for digital success.