The Dragon's Den (Warders #3), by Armen Pogharian (author), Michelle Babb (narrator)

Armen Pogharian, ISBN 9798868720390, November 2023

The Warders, the secret protectors of the city of Eridan, are facing a new danger. It's alarming enough when an agent working in another city is killed, and a magical artifact stolen. When the local head of the Thieves' Guild contacts the Warders, the message, and one of the messengers, is even more alarming.

The unexpected messenger is a rogue Shaulan assassin, Khelan, and the message concern a plot whose roots are in a centuries-old conflict between two groups of elves. A Chaotic Order sorceress is determined to gain control of the long-suppressed elven magic, and use it to seize power over the entire Federation of which Eridan is a part. 

My Teacher Flunked the Planet (My Teacher is an Alien: Book #4) by Bruce Coville (author, narrator), Rueby Wood (narrator), Full Cast Audio crew (narrators)

Full Cast Audio, ISBN 9781955324052, January 2023 (original publication June 1992)

Seventh-grader Peter Thompson and his friends, Susan Simpson and Duncan Dougal, have had some pretty startling experiences over the past year. For instance, several of their teachers have turned out to be aliens, on Earth to investigate our species and our culture. Along the way, they've experienced some pretty weird effects of the aliens' technology first-hand. Now they've been kidnapped by the aliens, and learned where all this has been headed.

The alien are trying to decide whether it's safe to let humans continue to advance our technology and emerge into the galaxy, or whether it would be the safer and wiser choice, given how violent we are even towards each other, to destroy us now before we can do any damage outside our own system. The consensus is tilting pretty heavily toward "wipe them out now."