@ Nureia: Conflict of Honors is a prequel, a stand alone novel of how 2 of the side characters meet. Conflict of Honors is NOT the first book in the series. The way that the authors wrote the series is really confusing.
How you should read the books is really up to you but I would recommend starting with the main story of Miri and Val Con and then going back and reading the prequels.
First: read Agent Gambit. This book has the first book in the series, Agent of Change, and the second book in the series Carpe Diem, in one big book.
Second, read Korval's Game, which has the third book Plan B, and the fourth book, I Dare in one big book. The first four books are very closely connected.
So after reading the first 4 books, you can read the prequels. This is where it gets confusing. The main 4 books deal with the children of the characters in the prequels. So if you want to see how their parents met, you can read the prequels.
First, read the book Local Custom- which shows how Er Thom and Anne met, parents of Shan, Nova, and Anthora
Second, read the book Scout's Progress which shows how Val Con's parents met. Third read the book Mouse and Dragon which continues Val Con's parents' story.
Fourth read Conflict of Honors which shows how Shan and Priscilla met (Shan is the foster brother of Val Con)
Fifth, the book Fledgling and the book Saltation deal with Theo, a daughter of someone (I cannot say because that is a spoiler) Both Fledgling and Saltation have a time overlap with the main books I Dare and Plan B.
Crystal Soldier and Crystal Dragon deal with the past way before the 4 main books with Val Con and Miri. Think like great great great great great grandmother of Val Con. You can read Crystal Soldier and Crystal Dragon whenever, because the events are so far back in the past.
The newest book being released is Ghost Ship in August 2011 which takes place right after I Dare. Fans have been waiting to find out what happens after I Dare for a very long time.
Here is a link to the author's website if I have confused you. Sorry! http://sharonleewriter.com/bibliography/correct-reading-order/