Patrick Grant: The father and husband, who imagines a bright future with his second wife Ella and their son Daniel. After Daniel's tragic death, Patrick is forced to confront uncomfortable truths about himself and his privileged world.

Ella: Patrick's second wife and Daniel's mother. She is portrayed as constantly understanding, reasonable, and thoughtful in her grief over Daniel's death.

Daniel Grant: Patrick and Ella's teenage son, a golden child who is talented and artistic. He is severely bullied at school, leading to his tragic suicide which shatters the family.

Rebecca: Patrick's daughter from his first marriage, who becomes increasingly bitter after Daniel's death but eventually starts to come to terms with it.

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Family Dynamics
The book delves into the complex relationships within a family, particularly between parents and children. It examines the gulf that can exist between them, and how tragedy can force them to uncover aspects of their children's lives they were unaware of.

Suicide and Bullying
A central theme is the suicide of a teenage boy named Daniel after being severely bullied by his schoolmates. Dunne handles the topic of bullying, both physical and psychological through modern technology, with sensitivity and insight. The novel portrays the devastating impact of bullying and the family's struggle to understand what led Daniel to take his own life.

Marital Relationships
The novel also explores marital relationships, including Patrick's first marriage to Cecelia, his affairs, and his subsequent marriage to a much younger woman named Ella. It examines the strain this puts on his relationship with his eldest daughter Rebecca, who resents her father's betrayal of her mother.

Grief and Loss
The narrative is driven by the family's grief over the loss of Daniel and their attempts to come to terms with his death. It delves into the emotional turmoil and healing process after such a profound tragedy.

In summary, The Things We Know Now tackles heavy themes of family dynamics, suicide, bullying, marital relationships, and grief, offering a sensitive and insightful exploration of these topics through the lens of a family tragedy.

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Dunne's portrayal of characters is often highlighted for its depth and realism.

Reviewers often commend Dunne's writing style, which is described as clear, poignant, and emotionally resonant. Her ability to capture the intricacies of human relationships and the pain of loss is particularly appreciated.

Many readers find the novel to be a deeply moving and thought-provoking read. It is praised for its ability to evoke strong emotional responses and for providing insight into the challenges faced by families dealing with tragedy.

Critics generally view "The Things We Know Now" as a powerful and insightful work. It has been praised in literary reviews for its sensitive handling of difficult topics and its contribution to discussions about mental health and family relationships.

Overall, "The Things We Know Now" is perceived as a significant and emotionally impactful novel that resonates with readers due to its honest and compassionate treatment of serious issues.