I'm stepping away from my usual personal finance book suggestions to highlight a classic that holds a special place in my heart:  How to Win Friends and Influence People by Dale Carnegie. This iconic book is truly transformative and is sure to leave a lasting impression on you, as it did me.  Don't buy it new - buy it from a used book site like www.abebooks.com for a fraction of the cost plus they offer free shipping.  Or better yet, check it out from your local library for free!