牛津樹系列7~9階(485~688)
共0本書
, 14+
第7階書目：（共17冊）
1.The broken roof
2.Lost in the jungle
3.Red Planet
4.Submarine Adventure
5.The Lost Key
6.The Willow Pattern Plot
7.The Hunt for Gold
8.The Jigsaw Puzzle
9.The Motorway
10.Roman Adventure
11.The Bully
12.Australian Adventure
13.The Big Breakfast
14.The Power Cut
15.The Riddle Stone（part1）
16.The Riddle Stone（part2）
17.A Sea Mystery
第8階書目：（共11冊）
1.What Was It Like？
2.The Evil Genie
3.Save Floppy！
4.Pocket Money
5.Victorian Adventure
6.A Day in London
7.The Rainbow Machine
8.Egyptian Adventure
9.The Kidnappers
10.Viking Adventure
11.Flood！
第9階書目：（共12冊）
1.Survival Adventure
2.Storm Castle
3.Superdog
4.The Quest
5.Dutch Adventure
6.The Finest in the Land
7.The Flying Machine
8.Rescue!
9.The Blue Eye
10.The Litter Queen
11.Key Trouble
12.Green Island
