What's the best book about small business finance?
In one paragraph
The Millionaire Next Door by Stanley and Danko. It's miscategorized as personal finance — two-thirds of the millionaires Stanley studied owned closely-held businesses, and the chapters on how they ran their books (low overhead, modest owner draws, reinvest for decades) are the most honest small-business-finance writing in print.
What this actually means
There's no single canonical 'small business finance' textbook on the same tier as the canonical investing books. Most titles in the category are either accounting how-tos (cash vs accrual, QuickBooks tutorials) or aspirational 'scale to $10M' marketing. The Millionaire Next Door is the rare book that captures how profitable small businesses actually get run.
Stanley and Danko's data: the average decamillionaire small business owner pays themselves a modest salary, keeps owner draws below what they could pull, reinvests in equipment and people, runs the business with minimal corporate overhead, and does this for 20-30 years. The opposite of the lifestyle the book's headline number suggests.
The Next Millionaire Next Door (2018, Sarah Stanley Fallaw's follow-up) replicated the research and confirmed the pattern still holds for newer business owners.
The Warren Buffett CEO by Robert Miles is the operator-discipline companion — profiles of Berkshire's small-company CEOs (See's Candies, Nebraska Furniture Mart, FlightSafety) reveal the same low-overhead, long-tenure, owner-mindset pattern.
For the actual accounting and cash-management mechanics, you're better off with a textbook or a CPA-friend conversation than a popular finance book. Most small-business 'finance' books in the bestseller list are sales tools for the author's coaching practice.
