Sharp reasoning that uncovers clever foreshadowing
The shocking truth reached after a series of twists and turns

Is it a coincidence or fate that I lost my beloved family?

A wealthy family of four gathers at a secluded luxury villa for their summer vacation.
And on the night of the annual elegant barbecue party, a shocking incident occurs where five of the party attendees are murdered and one is injured.
The culprit quickly turned himself in, but he only confessed to killing indiscriminately because he wanted to be executed, and did not reveal the specific method by which he killed so many people in one night.
If the criminal refuses to testify and is executed as he wishes, the truth will never be known.
The bereaved families, eager to learn how their loved ones were murdered, decide to gather once again for an 'inquest' to investigate the events of that day.

A verification meeting with the condition that even people who are not parties to the incident can be brought in if they can help.
On that day, one of the bereaved family members is accompanied by detective Kaga Kyoichiro, an elite police officer from the 1st Investigation Division of the Metropolitan Police Department.
Gaga, who is in charge of the verification meeting, asks, “Please do not lie,” as “If there is even a little bit of a lie mixed in, it will make it difficult to find out the truth.”
However, the verification meeting, which seemed to be proceeding smoothly, is thrown into chaos when a letter containing an eerie message is revealed.
The tragedy of that night is reconstructed through the verification meeting.
What is the truth hidden in the lies?

“The most important thing in this work is ‘someone.’”

In a written interview commemorating the publication, the author revealed that the part he put the most effort into while writing “You Killed Someone” was “I put a lot of effort into portraying the characters as human beings with blood flowing through them, not as long-term pawns.”
As he intended, each of the fifteen characters in the work stands out with their own unique personalities, and the novel is full of vivid realism, as if watching the story of a living, breathing human being right next to you at every moment.

Although this is a true mystery genre work that focuses on uncovering and uncovering the truth behind a difficult mystery that is not easily solved, the three-dimensional characters created by the author naturally lead readers to follow the characters' relationships and stories.
Additionally, in 2019, a former Vice Minister of Agriculture, Forestry and Fisheries, unable to bear the violence of his reclusive, lonely son, killed his son and turned himself in, which served as a motif for some of the work, and it also does not miss out on the ‘social’ element that poses a contemporary topic to readers.
While focusing on the high-level puzzle-solving that is the true joy of a true mystery, the background and characters that form the framework are thoroughly based on 'reality', adding realistic tension that makes you immerse yourself in the story rather than simply solving a puzzle.

Critic Jang Gyeong-hyeon said about the work, “If you read it to the end and reflect on it, the words they said will come to you with new meaning.
Keigo Higashino has painstakingly and convincingly portrayed both goodness and evil in each and every character.
Yes, the most important thing in this work is ‘someone.’”
The unpredictable inner world of these characters, who are “humans with flowing blood,” and the double and triple layers of truths cleverly hidden, along with clever foreshadowing and repeated twists, complete the work as an overwhelming mystery.

The splendid return of 'Detective Gaga'!
The ultimate mystery that's entertaining from start to finish

The "Detective Kaga Series" is a representative popular series that has accompanied Keigo Higashino throughout most of his writing career, with cumulative sales of over 13 million copies over 38 years.
The reason why the "Detective Kaga Series" has received such passionate support and love from readers for such a long time and has established itself as the author's representative work is because it most faithfully displays the charm of "Higashino Keigo's mystery" by adding the fun of traditional detective stories to the special resonance of the characters' sorrowful narratives.
Excluding 『String of Hope』, which is defined as a spin-off of the series, this new work 『You Killed Someone』, published 10 years after 『When the Curtain of Prayer Falls』, also presents a heart-wrenching narrative of characters and an even sharper and denser mystery, thrilling not only existing fans of the series but also general mystery readers.
Readers who love mystery will know from the moment they open the first page that critic Akiyuki Sengai's words, "This is undoubtedly Higashino's greatest masterpiece of the past ten years," are not an exaggeration.