Robin Jarvis has 4 audiobooks on Listento.it, narrated by 2 narrators. The most-rated is The Dark Portal.

Dark forces are brewing in Hagwood The werlings of Hagwood live peacefully in the trees of the forest - overlooked and unbothered while they leisurely perfect the art of wergling (shape-changing). But unlike his fellow werlings, the bumbling Gamaliel Tumpin can’t manage to wergle into even the simplest of forms - a mouse - like his peers. He’s tormented by his sister, Kernella, and teased by his classmates. And he envies star student Finnen Lufkin, who can transform into almost any creature. But wergling will soon be the least of Gamaliel’s troubles. The evil elf queen Rhiannon, the High Lady of the Hollow Hill, is desperately seeking a precious possession that was stolen long ago. Her evil knows no bounds, and with her army of monstrous thorn ogres, she will not stop until it’s found. The werlings’ peaceful existence is threatened by death and danger - and clumsy, awkward Gamaliel will need to call on the strength within him to fight for his family and his home.
©1999 Robin Jarvis (P)2013 Audible, Inc.

The hideous spirit of Jupiter, the evil cat who was once lord of the sewer rats, has returned, more terrifying than ever. Bent on revenge for his death, he is determined to turn the world into an eternal winter of hatred. The Deptford Mice feel his chilling grasp everywhere they turn. Their allies are murdered, and the prophetic bats flee, sensing impending doom. A rat army thirsty for mouse blood is building underground. And most frightening of all is that the Starglass, their magical source of knowledge and power, has been stolen by a cruel and violent hand. The mice know they face the most desperate struggle of their lives. Will anyone survive?
©1990 Robin Jarvis (P)2007 Blackstone Audio Inc.

The race to save Hagwood has begun! Wicked queen Rhiannon, High Lady of the Hollow Hill, is more intent than ever on finding the enchanted casket containing her heart. Made immortal through evil sorcery, she has ruled the land of Hagwood heartlessly for far too long. If someone can discover the lost casket and destroy the beating heart within, her terrible reign will end. The werlings Finnen and Gamaliel - in possession of the golden key that will unlock the High Lady's casket - race to find it first. Their quest leads them to the Pool of the Dead, where the hideous Peg-tooth Meg resides with her slimy snails and mutated sluglungs. Caught between the armies of Peg-tooth Meg and the High Lady, Gamaliel and his friends must make a desperate stand to save the world of Hagwood from the forces of evil.
©2013 Robin Jarvis (P)2014 Audible Inc.

Every mouse knows of the dangers in the sewers, where bloodthirsty gangs of rats roam. But one curious mouse can't resist that perilous world and thus must face evil at its strongest - or the entire city of London could be destroyed.
©1989 Robin Jarvis (P)2006 Blackstone Audio, Inc.