Hey,
If you seem not to have read much about methodology yet, then how can you be sure that the qualitative methodology is best for you? I cannot recommend you any books on methodology in general. Both quantitative and qualitative methodologies differ depending on the filed of study (social sciences, history, media etc.). I'm sure there are books that refer to methodologies within your field. Finally, remember that there is a major difference between the methodology and method!
Good luck!
M