Doctor Devlin has been collecting poisonous creatures from all over the world for years. Inside his secret shop, he invents special venom mixtures and records them in The Poison Handbook. The doctor used to sell the poisons to criminals, but now he only sells cures to help people who are sick. When an old customer visits the shop and causes trouble, everyone and everything around Doctor Devlin is in danger. The doctor must act quickly if he doesn't want the situation to turn deadly...

Wow! Fiction follows on from Wow! Facts series and each book can be paired with a non-fiction counterpart on the same theme such as Exploring Space, Ancient Egypt or Fighter Planes. Some children may want to find out more about the topic and they can access a non-fiction book at the same level, providing an opportunity to experience different text types and formats.

The titles in the WOW! Fiction series of Hi-Lo books for students aged 9+ include books for reading ages 6-11 years and utilise a range of dyslexia-friendly features to support pupils' reading. The titles in the Gold band have a reading age of 6.5 years and an interest age of up to 14 years. WOW! Fiction books are printed on off-white paper and incorporate an easy-to-read font and text separated into bite-sized chunks, along with carefully considered letter and paragraph spacing that can reduce visual stress. While these books have instantly appealing characters and gripping storylines, the language and sentence structure are intentionally written so that students who are reading behind their chronological age can succeed in reading them. The whole banded series offers progressively levelled books in Turquoise, Purple, Gold, White, Lime and Brown bands, with 5 books offering plenty of practice at each level to consolidate learning and develop fluency before moving on.