Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Shadow and Wrath | 2024 | Penn Cassidy | Buy |
| 2 | Wrath and Ruin | 2025 | Penn Cassidy | Buy |
| 3 | Ruin and Rot | 2026 | Penn Cassidy | Buy |
The Undesirables is a three-book series by Penn Cassidy that began in 2024 with Shadow and Wrath. The second book, Wrath and Ruin, followed in 2025, and the third, Ruin and Rot, arrived in 2026. Each title shares a word with the next entry in the sequence, creating a chain effect: Shadow and Wrath leads into Wrath and Ruin, which connects to Ruin and Rot.
This linking title pattern suggests the books are tightly connected, with each story picking up threads from the previous one. The dark, aggressive tone of the titles points toward a gritty or intense reading experience. With one book released per year, the full trilogy is now available for readers who prefer to start a completed series.