Jim Koch, founder of The Boston Beer Co., Boston, brewer of Samuel Adams beers is writing a book titled “Quench Your Own Thirst: Business Lessons Learned Over a Beer or Two.” Based on more than 30 years of experience as a business owner and brewer, Koch offers insights into the ride from scrappy start-up to thriving public company, according to New York-based Macmillan Publishers. His business model and recollections offer counterintuitive lessons that entrepreneurs and drinkers can apply to business and to life, it adds.