Cat Autumn

In the wild coastal forest lies a mysterious portal.
Neither Niva nor her three psychic rescue cats have seen the like. Though Niva and kits Axtel and Flaxrud tremble in fear, shy Sandstrom is mesmerized by the phenomenon. When Sandstrom leaps in and disappears, Niva has no choice but to save him.
The portal leads to another universe where a race of techno-medical felines is fighting a bloody land war. Sandstrom, swayed by propaganda, is eager to join their alien army, but soon he learns he has a higher duty. When Niva is captured and sent to a gruesome surgical ward, Sandstrom must be the one to do the saving.
Aided by a sympathetic alien and a powerful shadow-panther, Sandstrom sets out to rescue Niva, but there is more at stake than he knows. Niva's presence in the alternate universe has tipped a precarious balance. One wrong move could mean annihilation for all.