Many authors celebrate a sales spike, then discover that advertising, editing, cover design, narration, printing, and delayed royalty payments have consumed the cash. This episode introduces a practical five-step Author Cash-Flow Map for understanding where publishing money comes from, where it goes, and which decisions deserve reinvestment. You will learn how to separate revenue from profit, calculate a simple break-even point for each format, track royalties across retailers, create a reserve for recurring production costs, and choose the next investment using evidence instead of excitement. A realistic case study follows an author comparing ebook, paperback, and audiobook economics before funding a second launch. The episode ends with an immediate spreadsheet exercise listeners can complete in under 20 minutes. The goal is not to promise instant wealth; it is to help authors make calmer, better-informed decisions that support consistent publishing and long-term growth.