The Roman Context of Acts

In Acts next semester I will be assigning Beverly Roberts Gaventa's Acts commentary (Abingdon, 2003) and, for lack of a more recent good succinct introduction to critical issues, Mark Allan Powell's What Are They Saying About Acts? (Paulist, 1991).

I would like also to assign a short, accessible (to upper level undergraduates), article-length, introduction to the first century Roman world to provide more historical context. Any suggestions?