 Children's books such as "A Series of Unfortunate Events" and "Artemis Fowl", that combined "fantasy/horror themes with comedy and had a broad appeal" inspired "Hollow Fields", though she noted some "manga and comic influences" in her overall work.Rosca enjoyed drawing Lucy and her "big range of expressions" as well as Miss Notch and her "prim mannerisms".She began the series in 2004 and by mid-2005, "had a cohesive version".