The Rosie Effect
The Rosie Effect is the sequel to The Rosie Project and continues the story of Don Tillman and Rosie as they settle into married life in New York. Their relationship faces a major new challenge when Rosie announces that she is pregnant. Don approaches the prospect of becoming a father in his usual highly logical, organised and research-driven way, but his attempts to prepare for parenthood inevitably lead to misunderstandings, increasingly complicated situations and plenty of comedy.
I still enjoyed this book and found it an entertaining follow-up to The Rosie Project. Don remains a very likeable character, and his literal thinking, elaborate problem-solving and tendency to turn relatively simple situations into complete chaos provide some genuinely funny moments. Much of the comedy comes from the gap between Don’s intentions and the way other people interpret his actions. He treats emotional and personal problems as if they were scientific puzzles, gathering information, creating systems and trying to calculate the most efficient solution. While this approach makes perfect sense to him, it often seems excessive or insensitive to Rosie and those around him. His careful plans therefore produce the opposite of what he expects: instead of creating certainty, they generate confusion, awkwardness and new problems.
Don’s logic also affects his relationship with Rosie in more complicated ways. He is genuinely trying to be responsible and supportive, but he often focuses so intensely on facts, risks and practical preparation that he struggles to recognise the emotional reassurance Rosie needs. This creates tension because Don believes that solving a problem demonstrates care, whereas Rosie may want understanding, flexibility or simply to feel heard. Their disagreements are therefore not just about what Don does, but about the different ways they communicate and express love. The humour comes from Don’s sincere attempts to behave correctly, while the relationship difficulties show how limited logic can be when applied to feelings and uncertainty.
I was less sure about the depiction of Rosie in this book. I really liked her in the first novel, but at times in The Rosie Effect she seemed less warm and understanding towards Don, and I occasionally found myself frustrated by the way she reacted to him. Their relationship felt different, and I didn’t connect with her character quite as much this time.
Despite that, the book was still comical and enjoyable, and I liked seeing Don trying to navigate marriage and impending fatherhood in his own unique way. It didn’t quite have the same charm as The Rosie Project for me, but I’m still invested in the characters and have happily continued with the series.
Overall: an enjoyable and funny sequel, although I preferred Rosie—and probably the relationship between Rosie and Don—in the first book.
The Rosie Result
I really enjoyed The Rosie Result. It was funny, warm and probably the most relatable of the three books for me. Don is still unmistakably Don, with his logical approach to situations and his ability to turn everyday problems into something far more complicated than they need to be, which provided plenty of genuinely funny moments.
This time the story focuses heavily on Don and Rosie’s son, Hudson, who is struggling at school and finding it difficult to fit in socially. As questions are raised about whether Hudson may be autistic, Don begins to reflect more on his own personality, experiences and the way other people have perceived him throughout his life. This creates an important connection between Hudson’s situation and Don’s own history, showing that the difficulties of being misunderstood do not necessarily disappear with age.
I found this aspect particularly relatable. The book explores neurodiversity by questioning the assumption that there is only one correct way to behave, communicate or form relationships. Hudson’s struggles at school are not presented simply as personal failures that need to be corrected; they also reveal how strongly schools and society expect people to conform to particular social rules. Don’s reflections reinforce this idea, as his logical way of thinking has often made him seem unusual to others, even though it is also one of his greatest strengths.
The parenting element is especially effective because Don and Rosie have to decide how best to support Hudson without treating him as a problem to be fixed. Their concern for him is understandable, but the story also recognises that protection can become another form of pressure if it focuses only on making a child appear more “normal”. I especially liked the idea that the goal should not always be to change someone so that they fit in, but to understand what works for them and help them find environments in which they can be themselves. This makes the book’s message about acceptance feel practical rather than simply sentimental.
At the same time, the novel does not suggest that every difficulty can be ignored in the name of individuality. Instead, it explores the balance between helping someone develop useful strategies and asking them to hide or suppress who they are. Don’s approach is often unconventional, but his willingness to analyse situations carefully allows him to recognise that Hudson may need understanding and support more than criticism. The humour comes from Don’s methods and observations, while the emotional weight comes from the question of whether people are being helped to thrive or merely being trained to conform.
I also enjoyed Don and Rosie’s relationship more in this book than I did in The Rosie Effect. They felt more like a team again, and it was nice to see how their family dynamic had developed. Their different approaches to parenting also added depth to the story, as they had to work out how to support Hudson while navigating their own assumptions and concerns.
Overall, The Rosie Result was a really enjoyable end to the trilogy. Funny, thoughtful and relatable, with some genuinely touching moments alongside the comedy. I enjoyed seeing Don as a parent and felt the story brought the series to a satisfying conclusion.
