There are plenty of great ebooks for teens and not-quite adults….

Sci-Fi

Have Space Suit Will Travel (Robert A. Heinlein)

Wolfling (Gordon Dickson)

Callahan’s Crosstime Saloon (Spider Robinson)

Tactics of Mistake (Gordon Dickson)

 

Juvenile/Young Adult Fantasy

The Riddle Master of Hed (Patricia McKilip)

Heir of Sea and Fire (Patricia McKilip)

Harpist in the Wind (Patricia McKilip)

The Cloud King (Keith Pascal)

Deryni Rising (Katherine Kurtz)

The Drawing of the Dark (Tim Powers)

 

Parables

Success is Just One Wish Away (Jon Spoelstra)

The Instant Millionaire (Mark Fisher)

Tiptoeing to Tranquility (Keith Pascal)

The Millionaire’s Secret (Mark Fisher)