Hello,

Options include opting for downloading a book without receiving any OTP:

Public Domain Sites: Now, go to the Project Gutenberg, Google Books, or Internet Archive. These websites provide free books that are public domain. They do not usually ask for OTP.

Most public libraries o ffer free ebooks through their websites or through apps like OverDrive or Libby. There is no need to apply for an OTP for this source.

Website with direct links to PDFs: There are some educational and research websites that publish direct links to book PDFs, which do not need OTP verifications. Just be sure to use only reliable sources so that you avoid pirated content.

Subscription Services: Also, there are several subscription services which provide a facility to download books without OTP like Kindle or Scribd; however, services of such types contain some other verification process, such as providing a password.

Always download from legal and safe sources; otherwise, it may be under objection or with security threats or copyright issues.