$100M Leads by Alex Hormozi is a book about how to increase sales by getting more engaged leads. It teaches us how to create a valuable lead magnet, cold contact people you don't know, build a large audience of followers, scale advertising profitably, build an affiliate program, and much more.
YouTube Secrets is a must-read if you want to start a YouTube channel to make money. Sean and Benji—the creators of multiple popular channels—help you unlock the YouTube algorithm, explain how to grow a channel from zero, and share many methods for making income. (Hint: Expect hard work!)
DotCom Secrets is a guide to building a successful online business using marketing funnels. Russel Brunson teaches how to grow an online audience with email marketing, multiply profits with "value ladders," and even provides exact scripts to create our own sales videos.