Problems include not getting any OTP for downloading eBooks. Here are some things you might do:

Check your Email: Spam/Junk Folder

The OTP may have been filtered into your spam or junk folder.

Ensure that the email address provided is correct and active.

Phone Number Verification

If it will go directly to your phone number, ensure it is correct and is active. There could be some network issues in the carrier that prevents this process.

Clear Browser Cache and Cookies:

Cache and cookies clearing in the browser has also solved many problems related to OTP delivery.

Turn off Ad-Blockers: Ad blockers can also interrupt the OTP delivery process. Try switching them off temporarily and then proceed.

Reach out to Customer Support

Help from the customer support desk of the website or the platform from which you're downloading your eBook is also available. They may guide you on more specific fixes or alternatives.

Try Different Device/Browser:

Try downloading the eBook on another computer or web browser.

If using a specific service or website, please provide additional details so I can give you more targeted advice.

In this case, if you're accessing an e-book reader or online library, please let me know and I may give you some much more specific troubleshooting steps.

Please let me know if you have any other questions.