Packt publishes books and video courses on programming, cloud computing, data science, cybersecurity, and web development. Their catalog is large and frequently updated, with titles on new frameworks and tools appearing quickly after release. Many books are written by practitioners and include code examples you can download.

The quality varies more than O'Reilly or Manning because of the volume of titles, but the breadth means you can usually find a book on a niche topic. Packt often runs promotions and bundle deals. For developers who want affordable, practical guides on specific technologies, it is worth browsing before defaulting to more expensive publishers.