It was popular, but not quite as popular as Paddington Bear.
Tropes present in this series include:
- Big Eater: Olga da Polga is nearly always hungry and can eat quite a lot.
- Cats Are Mean: Downplayed example. Noel is more of a Jerk with a Heart of Gold but he's not evil.
- Comic-Book Time: No matter whether it gets a Setting Update or not, Olga and Boris will always remain young guinea-pigs and never age. Karen the guinea pigs' owner will never age.
- Cool Old Guy: Or rather, cool old tortoise, as Graham the tortoise, is old, but has a different, unique way of looking at the world.
- Fire-Forged Friends: Olga is initially jealous of Fircone and Raisin, two hamsters who appeared in a later book, but she quickly gains respect for them after they stand up to Noel the cat.
- How We Got Here: The first book starts with Olga in a pet shop and other guinea pigs.
- Lighter and Softer: While it was already a light and fluffy story, the picture books are even softer in tone than the original book. Justified, as they're aimed at a younger audience.
- No Antagonist: The story is very Slice of Life, and although Noel the cat can be obnoxious at times, he is not a Big Bad or even villainous.
- Schrödinger's Canon: It's never been confirmed if it's in the same continuity or canon as Paddington Bear or not.
- Slice of Life: The biggest conflicts come from misunderstandings or Olga's tall tales, not earth-shattering conflict.
- The Munchausen: Olga, and her boyfriend Boris, are both prone to exaggerating and fabulism in the story for otherwise mundane things.