What department you need first at a startup: buy book how to start a company

HOW TO START A COMPANYSTART YOUR OWN BUSINESSBUY BOOK HOW TO START A COMPANY
This book is about how to start a company , What are the step to follow ,why you should start a company step by step all in detail .This book is helpful for the everybody who interested to now what are step and process require to start a company and business .Starting a business is hard work, requires a lot of determination and learning, and only pays off in the long term. Take an honest look at yourself before leaping. Are there customers with real pain and money? ... Customers may “like” a product, but will generally only pay for things they “need,” physically or emotionally.How to Start a Company (English, Paperback, Upadhyay Arvind)
HOW TO START A COMPANY: START YOUR OWN BUSINESS