Hope you see this. I'm not going to recommend a book. Pick any book recommended here.(They all give similar advice). And go a step further. Learn how to use A

Hope you see this. I'm not going to recommend a book. Pick any book recommended here.(They all give similar advice). And go a step further. Learn how to use Anki. Use Anki while reading the book and I guarantee you this - you'll master sales at least 10x faster because.. Because you'll remember to use them instead of jumping from book to book and from course to course. Hope you heed this advice - you'll be glad you did.