3 Free Ebooks to Read in April 2026 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 Man of Last Resort

The Man of Last Resort

By Melville Davisson Post

After seizing control of the Arizona statehouse through a ruthless three-man political machine, a failed lawyer and his accomplices find their absolute power crumbling under the weight of a looted treasury. 

Facing certain imprisonment for their brazen corruption, the desperate trio turns to Randolph Mason, a brilliant but morally bankrupt attorney famous for helping the guilty evade the law. 

This classic collection follows America’s most dangerous legal mind as he weaponizes his mastery of the justice system to protect scoundrels, proving that no crime is too large if your lawyer is smart enough.

The Informer

The Informer

By Liam O'Flaherty

Set against the backdrop of a turbulent, early 20th-century Dublin, Francis Joseph McPhillip is a desperate fugitive grappling with the heavy burden of murder and revolutionary betrayal. 

Navigating a grim underworld of poverty and political unrest, he evades authorities while drowning in profound guilt and paranoia. As he maneuvers through a treacherous landscape of desperate inhabitants, McPhillip faces the crushing personal cost of his actions. 

The Informer is a tense exploration of loyalty, morality, and the psychological decay of a man who has betrayed his own cause.

The Mystery of Mary

The Mystery of Mary

By Grace Livingston Hill

When wealthy Tryon Dunham agrees to protect a beautiful, terrified stranger named Mary at a bustling train station, he never expects her to vanish into thin air, leaving behind only a haunting memory and a dangerous mystery. 

Driven by an intense connection to the mysterious woman, Tryon abandons his comfortable life to track her across the country to Chicago. As he delves deeper into the shadows surrounding her, he uncovers a perilous secret that threatens to destroy them both. 

Now, Tryon must unravel the truth about her identity before the danger she was running from catches up to them.