books for selling yourself/business etc

Hey wondering if anyone knows of any books to sell your self/business.

I am a landscape tradesman and very confident with my work and how I present myself to potential clients, (albeit covered in tattoos)

but wondering if there are any good books to further this skill

I know a few mates dads and mine a like could sell ice to an eskimo and thats the style I want to learn..

Thanks in advance

books for selling yourself/business etc