Friendship: How to Win Friends and Influence People

Dale Carnegie's book has sold over thirty million copies, and nearly a century later it still sells more than a quarter-million copies each year.

He encourages people to listen, be interested in others, speak to them from their point of view, sincerely flatter others, seek similarity, avoid conflict, and many other things that seem obvious, but that we all routinely forget to do.

However, his methods can be manipulative and lead to shallow friendships.