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eBook LCP Passphrase Help

eBook LCP Passphrase Help

Learn how to open DRM-protected eBooks purchased from Atlantic Books using your LCP passphrase and a compatible reading app.

What is the LCP Passphrase?

Some eBooks sold on Atlantic Books are protected using LCP (Lightweight Content Protection) DRM technology. This is an industry-standard security layer that ensures only authorised customers can access purchased content.

To open a protected eBook, you will be prompted to enter your LCP passphrase inside your reading application. This passphrase is unique to your purchase and is linked to your account details.

What Should I Enter as My Passphrase?

Your LCP passphrase may be one of the following — try each if the first does not work:

- The email address used when placing your order
- Your account password on Atlantic Books
- Your registered mobile number used during checkout
- A custom passphrase you set during the purchase process

Recommended Reading Applications

Download any one of these LCP-compatible apps to open your purchased eBooks.

Thorium Reader icon

Thorium Reader

Windows · Mac · Linux

A free, open-source reading app fully compatible with LCP DRM protected eBooks.

Download free →
Cantook icon

Cantook

iOS · Android

A mobile reading app with full LCP support for purchased eBooks.

Download free →
PocketBook icon

PocketBook

iOS · Android

A versatile eBook reader app supporting LCP protected content on mobile devices.

Download free →

Note: All listed applications support LCP DRM and are available for free download.

Troubleshooting

If your passphrase is not working, try the following steps:

- Check for extra spaces before or after the passphrase
- Try your registered email address as the passphrase
- Check uppercase and lowercase — the passphrase is case-sensitive
- Reset your account password and try the new password
- Ensure you are using a supported reading application listed above
- Re-download the eBook file and try again

Note: If none of the above work, your eBook may need to be re-issued. Please contact our support team with your order number.

Contact Support

Our team is happy to help. Please reach out with your order number and the title of the eBook you are trying to open.

Email: support@atlanticbooks.com