The way it combines humor and romance is a major factor. In 'Can You Keep a Secret', there are many humorous situations that the characters find themselves in. This not only lightens the mood but also makes the romantic moments more impactful. The author's writing style is also very accessible, allowing readers to easily get lost in the story. The slow - burn aspect of the romance, where the relationship between the characters develops gradually, is something that a lot of readers enjoy in modern romance novels.
The characters are very relatable. The lead characters in 'Can You Keep a Secret' have their flaws and insecurities, which makes them feel like real people. Their journey towards love, while dealing with these personal issues, is what draws readers in. The dialogue is also witty and engaging, making the interactions between the characters feel natural and fun, which is a big part of what makes it a popular modern romance novel. It also has a great setting that adds to the overall charm of the story.