Five Go Adventuring Again by Enid Blyton
Published June 20, 2020

The gang return for a second adventure, but this time the mystery comes right to their door. With everyone staying at George’s house, and a tutor coming in to give them additional lessons, there’s a plot afoot. I didn’t think this one was quite as good as the first, but mostly because I loved the island in the first one. This time, it’s about secret passageways and scientific espionage!