Which research paper topic is best organized with a comparison-and-contrast structure?

Comparing and contrasting two novels/books are easy to do when you have a set topic. Comparing two books that involve school bullying or suicide would be easy to start with mainly because these topics are always talked about. 

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form