Choose a single searchable recovery angle for the whole book
Pick one primary search intent and make the manuscript match it at the blueprint level. Examples of intent patterns that tend to convert in memoir are “early recovery after X,” “relapse and how it changed the person,” “recovery from grief compounded by addiction,” “caregiving while in recovery,” or “what treatment looked like when you were the patient.” Your subtitle should name the recovery situation (the thing readers search), and your internal chapter arc should repeatedly return to the same underlying question, such as “How did I learn to live without using?” or “What did I misunderstand about myself at the start?” Avoid splitting the book across multiple unrelated problems (for example, addiction plus a long career plus a travel year) unless every section clearly serves the same recovery question.