An Unforgettable Kiss (The Bridgertons Book 7) - by Julia Quinn

All of high society agrees that there is no one like Hyacinth Bridgerton. Cruelly intelligent and unexpectedly frank, she is already in her fourth season of elite social life, but fails to impress any suitor.

At a recital, Hyacinth meets the handsome and attractive Gareth St. Clair, grandson of her friend Lady Danbury. To her surprise, despite his reputation as a libertine, he is able to hold a proper conversation with her and, at times, even leave her speechless and with butterflies in her stomach.

However, Hyacinth resists the seduction of the famous conqueror. For her, every word Gareth utters is a challenge that must be responded to accordingly. Therefore, when he appears at Lady Danbury's house with a mysterious diary from his Italian grandmother, she decides to translate the text, which may contain decisive secrets for his future.

In this task, the two first find themselves debating translations, then exchanging confidences, until, finally, they break social rules. And, by spending time together, they will discover that the answers they seek are found in each other... and that there is nothing as simple or as complicated as a kiss.