High Wizardry

Young Wizards #3
High Wizardry first edition hardcover (by Neal McPheeters)
High Wizardry Harcourt (first mass market paperback cover)
High Wizardry Corgi (UK) mass market paperback cover
High Wizardry Harcourt mmpb cover (by Cliff Nielsen)
High Wizardry Harcourt digest format cover (by Greg Swearingen)