These are books from the 'Best For Boys and Girls' section of 'More Book Lust: Recommended Reading for Every Mood, Moment, and Reason' by Nancy Pearl, supplemented by sequels in the Bagthorpe Saga, Earthsea cycle and The Hermux Tantamoq Adventures series.
Pre-adults is the equivalent term for children in "Politically Correct Holiday Stories" (which is best read at this time of year for full humorous impact, given its spoofs of A Christmas Carol, certain reindeer etc).
This is a single category embedded in the 'More Book Lust' challenge posted 2 years ago by jobinsonlis, but expanded by ~20 books.