"In reality we don't fall out of love," writes Mark Goulston, M.D. "Rather, love falls out of us, like the floors of a building whose foundation crumbles." If you're in a relationship that has lost its magic, The 6 Secrets of a Lasting Relationship aims to rekindle your heart by teaching you a process of examining, discussing, and fixing your relationship. The first letters of each of the six secrets make the acronym CREATE: chemistry, respect, enjoyment, acceptance, … mehrtrust, and empathy. Goulston maintains that relationship problems are caused by a breakdown in one or more of these elements, but if you strengthen the supporting structure in these overlapping areas, you can restore your passion and romance and discover "a new, mature love that surpasses in depth and intimacy all your romantic memories." Whatever the specific problems in your relationship, he says, improving these six areas will help restore your bond. The 6 Secrets of a Lasting Relationship is like couples therapy in a book. You and your partner will want to work through specific chapters together, which you'll return to often for guidance. You'll learn warning signs that your relationship is in trouble in one or more of these areas, how to communicate about it, and how to repair and renew the relationship. Goulston includes self-tests, exercises, and many anecdotes that illustrate his points. Eye-catching quotes pepper the chapters, such as, "Love is the answer, but while you are waiting for the answer, sex raises some pretty good questions," (Woody Allen) and "Men always want to be a woman's first love--women like to be a man's last romance" (Oscar Wilde). Goulston is a board-certified psychiatrist and a well-known relationship advisor who has conducted 10,000-plus hours of couples therapy. Goulston and coauthor Philip Goldberg also wrote Get out of Your Own Way. --Joan Price weniger