Manuals that have shaped our services, accompany us in our decisions and make us better professionals.

Feel free to recommend any more to add to the list.

Sales Books:

The Quick and Easy Way to Effective Speaking from Dale Carnegie

Predictable Revenue: Turn Your Business Into a Sales Machine with the $100 Million Best Practices of Salesforce.com by Aaron Ross

From Impossible to Inevitable: How Hyper-Growth Companies Create Predictable Revenue by Aaron Ross

Predictable Prospecting: How to Radically Increase Your B2B Sales Pipeline by Marylou Tyler

Fanatical Prospecting: The Ultimate Guide to Opening Sales Conversations and Filling the Pipeline by Leveraging Social Selling, Telephone, Email, Text, and Cold Calling by Jeb Blount

The Science Of Selling David Hoffeld's

Influence: The Psychology of Persuasion by Robert Cialdini

The Ultimate Sales Machine: Turbocharge Your Business with Relentless Focus on 12 Key Strategies by Chet Holmes

New Sales. Simplified.: The Essential Handbook for Prospecting and New Business Development Mike Weinberg's

Way of the Wolf by Jordan Belford (The Wolf of Wall Street)

Design and Product Launch Books:

Obviously Awesome: How to Nail Product Positioning so Customers Get It, Buy It, Love It by April Dunford

Measure What Matters John Doerr(here you haveinSpanish)

Expert Secrets: The Underground Playbook for Creating a Mass Movement of People Who Will Pay for Your Advice by Runsell Brunson

The Hard Thing about Hard Things: Building a Business When There Are No Easy Answers by Ben Horowitz

The Lean Startup: How Constant Innovation Creates Radically Successful Businesses: How Relentless Change Creates Radically Successful Businesses by Eric Ries

Restart: Erase what you have learned and think about the company in another way by Jason Fried

The Myth of the Entrepreneur: Why Small Businesses Don't Work and What to Do to Make Them Work by Michael E. Gerber