If British author L.S. Hilton had her way, her new book “Maestra” would come with a warning label on it. “It would say, ‘THIS IS NOT A LOVE STORY,’ ” says Hilton, who spoke with The Post on the telephone from the Gritti Palace in Venice, Italy. “Maestra,” which came out Tuesday, is the first installment in a trilogy and is bound to be the It beach book of the summer — with a lot of graphic sex, several murders and no romance whatsoever.

It’s been on the Top 5 best-selling hardcover fiction list for the past five weeks in the UK. It’s now sold in 38 countries, its first draft sparked a seven-figure bidding war last summer, and it’s already being made into a major Hollywood film with a screenplay by Erin Cressida Wilson, who also penned the script for “The Girl on the Train.” “Maestra” is currently ranked No. 48 in the psychological thrillers category on Amazon. FULL REPORT