The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.

P- They never desert us even when all fair weather friends have deserted us. 
Q- Books are never failing friends. 
R- They dispel the dark clouds of gloom from our minds and increase our happiness if we are already happy. 
S- Through the ages, the scriptures and other great books have provided, immeasurable solace to the wounded and strife torn humanity.