21 books • 10 series
No Escape (Usborne Adventure)
Murder at the Haunted Hotel (Usborne Spinechillers)
Silent Snow (Usborne Adventure)
Puzzle Adventure Omnibus (Usborne Puzzle Adventures S.)
Monster Gang (Usborne Reading for Beginners S.)
Chocolate Island (Usborne Young Puzzle Adventures S.)
Agent Arthur's Puzzle Adventures (Puzzle Adventures, 8, 9, 12)
Agent Arthurs Puzzle Adventure
Time Train to Ancient Rome (Usborne Puzzle Adventures S., #6) (Puzzle Adventures) (Puzzle Adventures)
Usborne Book of Puzzle Adventures
Book of Puzzle Adventures (Puzzle Adventures, 4-6)
Murder on the Midnight Plane (Puzzle Adventures) (Puzzle Adventures) (Usborne Puzzle Adventures S.)
Curse of the Lost Idol (Usborne Puzzle Adventures S., #2) (Puzzle Adventures)
First Book of Science (First Science)
Science Tricks and Magic (First Science) (Usborne First Science S.)
Science Surprises (Usborne First Science S.)
Simple BASIC
First Book of the Computer
The Beginner's Programming Handbook (Usborne Computers & Electronics)
Computer Fun
Practise Your BASIC