"A few books"
It should be "kuch kitabe" and not "thori kitabe" because 'thori'/'thora' is generally used to define uncountable quantities. For example Thora pani do (Give some water) or thori si chai milegi (can I have some tea). 'Kuch' on the other hand generally defines countable quantities like books in this case. For example Kuch larke khel rahe hai(Some boys are playing) etc.