You've located three books on a topic you're researching for essay.The frist thing you should do in determing if any of these books will be useful is

Respuesta :

Check the date of publication, check the context, determine which one has best information on your topic. This is what I've learned so i hope this helps!
The answer to your question is check the date of publication, check the context and determine which one has best information on your topic.