This huge collection of eBooks from MSDN covers various computer topics, including Microsoft software such as Windows 10, Office 365, and Azure, offering quick getting started guides and in-depth how-tos. The collection has been updated annually by Eric Ligman and has been downloaded millions of times. Additionally, Zapier offers a range of free eBooks on different topics, including Getting Started with Zapier, Ultimate Guides to Remote Work, CRM Apps, and more. These resources can be beneficial for individuals looking to improve their tech skills or advance their careers.