luckily my friend have those two books. That means, I can tell your some codes to share. Here are the codes:The Inventor’s Apprentice
Q: What word is on page 5, 5 words from the left on line 10?
A: Good
Q: What word is on page 5, 4 words from the left on line 3?
A: Board
Q: What word is on page 6, 5 words from the left on line 17?
A: Plans
Q: What word is on page 6, 7 words from the left on line 14?
A: Extreme
Q: What word is on page 7, 2 words from the left on line 12?
A: Find
Q: What word is on page 7, 7 words from the left on line 17?
A: Where
Q: What word is on page 8, 7 words from the left on line 4?
A: Round
Secret Agent Handbook
Q: What word is on page 5, 6 words from the left on line 9?
A: Give
Q: What word is on page 5, 3 words from the left on line 5?
A: Fashions
Q: What word is on page 5, 4 words from the left on line 18?
A: Decides
Q: What word is on page 5, 4 words from the left on line 2?
A: Matter
If you have already complete each book, you only get 2000 coins. If you haven't... you will unlock the blue book item and 1500 coins.
Here are all the cheats:
Page 14 - Move the paint bucket to the right to reveal a hidden coin
Collect all of the hidden coins to earn a 800 coins