As many parents, teachers, and librarians know, not all children are good readers or even care to read. Some even have learning disabilites and reading difficulties that have made it painful and a chore to read. Hi/Lo books are written with these children in mind and are books that are intended to stimulate a high interest but are written for a lower reading level. Vocabulary, text print and page layouts in these books are usually crafted to appeal to children and young adults who usually do not like to read for various reasons.
It has not been easy to find good lists of Hi/Lo books for young adults and teens on the Internet. Some of the best sites I found are:
http://www.madisonpubliclibrary.org/youth/booklists/highlow.html
http://www.waterborolibrary.org/bklisty.htm#yarr
I would be interested in learning of any other good Hi/Lo sites or lists on the Internet.