R-T, Margaret, and the Rats of NIMH

This middle grade adventure, the third book in the beloved Rats of NIMH series, follows human siblings Margaret and Artie after they become lost during a family camping trip. They are unexpectedly rescued by the highly intelligent, scientifically enhanced rats of NIMH, who have built a secret, advanced community. The children find temporary safety but face the challenge of returning home and, more importantly, protecting their new friends' existence. The story explores themes of survival, loyalty, responsibility, and the ethical dilemmas of keeping a significant secret. It's an engaging read for children aged 10-14, offering a blend of realistic peril and imaginative animal fantasy.

The further adventures of the intelligent young rat Racso and his friends Christopher and Isabella as they try to ensure the survival of their secret community in Thorn Valley after its accidental discovery by two human children.