[CRussel]

Hi, piperclassique. First and foremost, the best resource for things like reading order is probably Korval.com. But to go directly to the Miri/Val Con stories, the order would be:

1. Agent of Change
2. Carpe Diem
3. Plan B
4. I Dare
5. Dragon in Exile
6. Neogenesis

Now, mixed in with those are the exclusively or primarily Theo stories:

1. Fledgeling
2. Saltation
3. Ghost Ship
4. Dragon Ship
5. Alliance of Equals
6. The Gathering Edge

and, one in which Miri/Val Con play significant roles, but aren't the central point, Necessity's Child. Which falls between Ghost Ship and Dragon Ship. Though all these later ones have a certain amount of overlap in time.