Well, I can tell you what not to read: Credit derivatives pricing models--Schonbucher and Credit risk modeling.. They are references only for research and/or for PhD studies; They are not for beginners and at least not for you for another 5-year if you are still wondering of  copula and BGM now.

If you are not in area of financial engineering or mathematical finance and without a (mathematical ) master degree, then stay away from too technical issues of credit derivative models.  They are not needed beyond quantitative modeling.

In this case, John Hull’s book has a chapter, which can be a good start if you want some quantitative approach. But you need some financial background either through studies (if not, so you still have a question what to read ) or job experience to read it comfortably. This book is usually not hard, but not too soft. Keep it simple to understand concepts only and how to use them in practice, but not bother much mathematics.

If you intend to study in a financial engineering approach, credit derivative is usually a last or later chapter of your professor’s lecture notes, so you will know at that time what to read.

Hope this helps you move on.

Lando和Schonbucher都没有出copula和HJM的范围， 请少扯淡

M y  dear  副教授,  请 focus on the topic, this is about books and type of books and need of books of different levels.  请  Make you contribution to the need of people, the books.   请  show your knowledge in other topic posts regardless right or wrong,  all right ?  

Again my dear 副教授,   请 No fighting or 少扯淡 , which does not make this page looks good or knowledgeable OK. Do not feel bad, and just let it go. Have a good night   

一我不喜欢装人生导师瞎指点，二我不对自己不熟悉的东西发表意见，不像有些人还没看过张嘴就来推荐，比如Justin London的C++，甚至还没看过张嘴就来不推荐，比如Lando和Schonbucher，三即使我推荐了人家弄不到怎么办，我推荐Credit Derivatives: The Definitive Guide edited by Jon Gregory， 100多刀拉，你买给一楼看吗

I don't know who is right, but it's good to see genuine comments from both sides.