Question

Could you suggest me a nice manual to introduce me to exploratory factor analysis?

There are many manuals. However, I would advise you this one:

Fabrigar, L. R., &Wegener, D. T. (2012). Exploratory factor analysis . OUP USA.

ISBN13: 9780199734177

Question

Could you suggest me an advanced manual to get to the bottom of exploratory factor analysis?

There are many manuals. However, I would advise you this one:

Mulaik, S. A. (2009). Foundations of Factor Analysis, Second Edition. Chapman & Hall/CRC, 2009.

ISBN: 978-1-4200-9961-4