Check out this awesome, very clear teaching on Justification by Faith by Ariel Ministries, Highly recommended:
Audios for download:
http://www.arielm.org/dcs/mbs105/dcs_podcast.php
Pdf for reading:
http://www.arielm.org/dcs/pdf/mbs105m.pdf
Q&A:
http://www.arielm.org/qbq/105.html
Please have a listen!!! be blessed!!!