For a contemporary romance novel like by Aitor Ferrer—the third installment of the Trilogía Ivana —the choice of paper depends on whether you are looking to print a physical copy or optimize the reading experience for the digital EPUB file. Physical Printing (Self-Publishing/Personal Copy)
Cream (Off-white) is the best choice for romance and fiction. It is easier on the eyes for long reading sessions and provides a "warm" feel that complements the emotional themes of the story. No te marches nunca - Aitor Ferrer.epub
Since you mentioned an file, the "paper" is the digital background of your e-reader: For a contemporary romance novel like by Aitor
The physical edition listed on Amazon typically uses standard trade paperback specifications. For this genre, the following are industry-standard: the following are industry-standard: