Right off the bat, here you go: 1. The 7 habits of highly successful people (Stephen Covey) 2. The Miracle Morning (Hal Elrod) 3. Business Model Generation (Aelxander Osterwalder) 4. The Art Of War (Sun Tzu) 5. The E-myth, why most businesses don't work and what to do about it (Michel Gerber) 6. Made In Japan (Founder of Sony, Akio Morita) 7. How to win friends and influence people (Dale Carnegie) Probably I missed a few more, but I think these ones are a good start.
Also recommended in this reply