Polizistenfamilie Johannsen Bücher in der richtigen Reihenfolge
The book you are referring to is part of the series by Salim Güler, which serves as a historical prequel to his popular modern-day "Polizistenfamilie Johannsen" crime novels.
: Reviews frequently describe the writing as "captivating," "riveting," and "emotional".
The specific title in your query, often cataloged as part of a "Book 0" or prequel collection, corresponds to the first volume of the historical series, (The Dead on the Beach), set in 1961 Niendorf. Series Overview & Reviews
For those interested in the full chronology, the BücherTreff database provides a complete list of the 25+ modern novels and their historical prequels.