Hai

I am tutoring a few students of form 4 and form 5 in maths.(HKCEE)
So i wud like to get some reference books.Does anyone happen to know the names of any reference books for these classes.I din get any from the public library.I guess its coz i dono the names of the books.
The students are also not cognizant of any.

Thanx a lot!
engee