As of my last knowledge update in March 2023, Alexis Calder is primarily known as a romance and fantasy author. She has written books that often blend elements of romance, suspense, and paranormal themes, catering to young adult and new adult audiences. Calder's works are characteristically engaging and fast-paced, typically featuring strong female protagonists and intricate plot lines. One of her most popular series includes the "Hades Trials," co-written with Eliza Raine, which is centered around Greek mythology and godly trials. It's worth noting that authors can sometimes share the same name, so if there are other Alexis Calders who have gained prominence in literature or other fields after my last update, additional research may be needed to provide up-to-date information about them.