Cheapest around if you have Amazon Prime
The iconic bestseller. The world's benchmark business and personal development book. This book will help you solve one of the biggest problems you face: how to get along with and influence people in your daily business and social contacts. Since it was first published in 1936, Dale Carnegie's all-time classic has been translated into almost every known language and continues to help millions of readers around the world. How to Win Friends & Influence People can help you achieve these important goals: Get out of a mental rut, think new thoughts, acquire new visions, discover new ambitions; Make friends easily and quickly; Increase your popularity; Win people to your way of thinking; Increase your influence, your prestige, your ability to get things done; Handle complaints, avoid arguments; Become a better speaker and more entertaining conversationalist
I can save you $10 and reading time:
https://en.wikipedia.org/wiki/How_to_Win_Friends_and_Influence_People