The mail is this :
Dear Dr. Lokeswar Patnaik,
My name is Irina Lungu and I am editor at Eliva Press. We specialize in publication and dissemination of academic books.
I went through your list of publications. We are interested to publish a book of your works.
The publication is free for our authors. You pay nothing to publish with Eliva Press. You will retain copyrights and earn up to 50% royalties. In addition, the book will be distributed worldwide through Amazon and many more.
Do you want to find more about our services?
Your reply would be greatly appreciated.
If you receive an unsolicited offer to publish your work, it is advisable to approach the situation with caution, thoroughly research the publisher, and seek professional advice if necessary. It is also important to ensure that publishing your work as a book does not violate any copyright or intellectual property agreements with the journal or other publishers. You should consult with the publisher of your original article to ensure that you have the necessary legal permissions to republish the work in book form.
See also https://www.researchgate.net/post/Eliva_Press_a_publishing_house including my own reply. I always ignore such invitations.