Guardians of the Singreale (The Singreale chronicles) by Calvin Miller Author of the Singer 1982

Raccoman Dakktare and Velissa travel to Rensland where the Star Riders courageously attempt to hold back the beast warriors of the demon lord Thanevial

The Moonrhymes, an innocent, cave-dwelling tribe of Graygills who lives in the northern strongholds of snow and ice, are invaded from the underworld by Drog soldiers who have escaped from the Kingdom of Ren. For the first time in their existence, the peaceful Moonrhymes must learn the arts of war.