4 Free eBooks to Read in July 2025 for Mystery, Thriller, and Crime Fans

Solve crimes with these mystery ebooks—free, this month only.

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camera-iconPhoto Credit: Martin Vorel

Those of us who are voracious readers can never get our fill. There is always some intriguing new mystery or riveting new thriller to devour and an endless stream of new releases to add to our reading wish lists.

But sometimes you just crave a classic. These are the books that created the scaffolding for the genres we know and love—and they are just darn good.

Every month, we’re bringing you a selection of free ebooks to read that are perfect for all you timeless sleuths out there—lovers of all things mysterious and thrilling.

The Woman in the Alcove

The Woman in the Alcove

By Anna Katharine Green

Miss Rita Van Arsdale grew up an orphan and never expected much from her life. But all that changes when she’s invited to a party with New York’s elite, and finds herself falling for the dashing Anson Durand.

In a shocking turn, he proposes to Rita, but the night is only just beginning. When a beautiful socialite is found murdered, Anson is named the primary suspect.

Desperate to latch onto her new life, Rita endeavors to prove his innocence, but will find herself tangled in the dark underbelly of New York’s high society. 

The Golden Scorpion

The Golden Scorpion

By Sax Rohmer

When the brightest minds in science turn up dead across London of mysterious causes, Detective Dunbar and Dr. Stuart, an expert in poisons, are on the case.

But when Dunbar’s friend, French detective Gaston Max, is next among the victims, the pair is in for a shocking twist. 

Max has been investigating an international crime ring, run by a mastermind known as the Golden Scorpion—all evidence suggests that the cases are related.

As they attempt to find the mysterious criminal, secrets unravel and twists arise—can the duo close the case before it’s too late?

The Thinking Machine on the Case

The Thinking Machine on the Case

By Jacques Futrelle

Known as “The Thinking Machine” to the tabloids, Professor Augustus S. F. X. Van Dusen spends his time in the laboratory, piecing together the horrific details of crimes. Cases that seem impossible to local authorities are a piece of cake for Van Dusen’s brilliant mind. 

This collection includes many of the stories that first introduced the mad scientist to the world, filled with powerful villains and savvy criminals, who are no match for the professor.

The Seven Secrets

The Seven Secrets

By William Le Queux

Although wealthy Mr. Henry Courtenay is nearing the end of life, his death comes as a shock to those who care for him—it must be murder, his servant declares. 

Dr. Ralph Boyd is tasked to find the culprit, and the list of suspects spans the inhabitants of Courtenay’s suburban London home—the only people who could enter a room unnoticed.

But soon, the detective will learn that secrets are lurking in every corner of the manor, and that the case won’t be as open and shut as he once thought…