Hi Lo books are so called because they have high interest and low difficulty. Typically, the subject matter is suitable for the age-group of the children who are reading it, but the reading level is easier than the usual material for that age-group.
While researching this topic, the author Michael Dahl attracted my attention. He is the Editorial Director for Stone Arch Books based in Minneapolis, where his books have won national design awards and been selected by the Junior Library Guild.
He is the author of more than 200 books for children and young adults. His nonfiction books get kids excited about reading. His fantasy series, The Library of Doom, is the most-read series by hi-lo readers across the US. Some of the titles in that series and the one that followed include The Book that ate my Brother, Sea of Lost Books and Cave of the Bookworms. Mr. Dahl himself lives in a haunted house! (Does that help him to write these scary stories?)
Apart from these, most of the books classified as HiLo are geared towards children described as reluctant readers. They are older children reading at grade 3 level or above. I didn’t find much for beginning readers, particularly for boys living in Jamaica. Do you know of any?