"Mereka menjaga buku itu."

Translation: They are guarding that book.

[Christian246721]

Must be quite a valuable book...hope they know kungfu as well!

[evabstracted]

"They guard that book" was not accepted. I don't understand why.

[gringoton]

How would you say, "when no one is watching, I will steal it?"

[deactivated user]

'When no one is looking' might be

Ketika tidak orang melihat

When no people look...

[noey536981]

Remember in Skyrim when you stole spellbooks and the wizards would start chasing you and cursing you?

[wendi962638]

Why not "those books"?

[TonyBerjaya]

The book must be very expensive or valuable.