If I recall correctly, no. Wow, that actually never crossed my mind.
You think they're actually going to expand on it, though? It wasn't made so obvious.
Personally, I think they will. I don't remember seeing the driver leave the compound when the rest of the Governor's forces retreated, so said person could easily have found their own way in the same way Tyreese and company did through the burned out portion of the building. I wouldn't be surprised at all to see a two-front prison attack; one force outside and one from within.
As for the compendium, buying both in paperback from Amazon will cost around $60 total (free shipping applies to anywhere in the US). I don't know about most local libraries around the country, but the few within driving distance of Alexial and me don't have any comics, let along something as large and costly as the TWD compendium. We've got a small DVD/CD section and, although the library has some pretty great funding, they haven't seen any type of update in over a year. If you do have a library with TWD trades or any other relevant comics, I'd count yourself as very lucky!
Also, the comic series is very much ongoing. If I'm not mistaken, Kirkman has been quoted as saying that he'll keep writing it until nobody is willing to read it. We're very likely to see Rick and company die, be replaced, and then see their replacements killed as well. The series is currently on issue 107 and there are many more to come! If they can get away with it I'd love to see the television show made in time with the books after a while. There are only 12 comics a year and each episode of the show covers the content of about 2 books. Eventually the book will have to speed up or the show slow down if they're to keep making both until some sort of actual conclusion.
Sorry to bring things so far off-topic! As for that...
Andrea, no matter who she sides with in the end, is going to have some serious explaining to do! Can you imagine being in her shoes for that? It'll be either, "Sorry, Mr. Governor, sir!" or, "Sorry, Mr. Rictator, sir!". If I were her I'd probably just make peace with Michonne and be on my way after the war. They worked so well together and seemed to have found some real happiness and comfort with each other. I know Andrea has become very attached to Woodbury's less crazy residents, but they're either all going to die by their own leader's hand or they're going to be cast back out into the wild, wild world. It'll be a tough choice to make, but I really do think Andrea will find more purpose and have a better chance at survival if she just takes off with Michonne and lives happily ever after.