Okay, here's a couple from my books. One is less than 50 words, one is right around 50 words, and one is more. (but still only around 80). They vary because of the amount of ad space I had. This kind of summary is great for query letters.
You do want to show the conflict and if you can, the marketing hook. (that's more applicable for category romance than single title.)
Four years ago, scared and alone, Lexie Jacobs arrived in Mill Creek, Montana with $24.63 in her pocket and a baby in her belly. The money was hers. The baby… wasn't. And now Daddy's found them. (36 words)
Modern medicine can replace a worn, defective heart, but only love can heal a broken one. At Camp Firefly Wishes, a summer camp for transplant kids and their families, divorced teacher Racheal Thompson faces her fear of loving and losing again when she falls for single-dad James McClain and his match-making, heart-transplant-recipient daughter Molly. (54 words.)
Sometimes life tests a man… His rebellious teenage daughter is pregnant by the boy he forbid her to see. His girlfriend - the one who was just going to be his ease-back-into-dating friend, until she crawled under his skin and into his heart - is also pregnant, and not sure she wants to have his baby, let alone marry him. Now Sloan Thompson is searching for the right thing to do for everyone involved and not sure he's going to survive…The Pregnancy Test. (83 words)
Susan G.