Business book recommendations

[AmIAWeed]

This year I have decided as my new years resolution to embrace marketing and sales.
I have a small business and fear I have become complacent so will set myself 2 challenges.
1 Read a marketing book each month
2 Read an inspirational entrapenur book each month
Both really need to be books as I spend ALL day on the laptop and have a nasty smart phone addiction so I'm hoping evening reading will help in multiple ways.
So anything you'd say are a must read to get my umph back?

"Your Press Release is Breaking My Heart" - Janet Murray. It's a great guide to doing your own publicity.

I also read the 2 books by the founders of Not On The High Street.

I have added the Janet Murray one to my basket, the Not on the high street book, do you remember which one was best?
We're an established business but I'm not afraid to go back to basics but wasn't sure if "Shape up your business" or "build a business from your kitchen table" may be best
If it's any help with recommendations we sell B2B as opposed to individuals.
Finally, Thank you SignOnTheWindow for taking the time to recommend some books, I do appreciate it