Ahl, Frederick, "Form Empowered: Lucan's Pharsalia," in Roman Epic, Routledge, 1993, pp. 125-142.

Perhaps the best short critical analysis of the Pharsalia
available. Ahl ends with a powerful overview of
Lucan's place as the poet of libertas.

Boyle, A. J., Roman Epic, Routledge, 1993.

An-up-to-date survey of the Latin epic from its beginning
to the Latin epics of the Renaissance. A specialist
in a particular author or period writes each chapter.
The articles are scholarly without being either dry or
difficult.

Gotoff, Harold C., Cicero's Caesarian Speeches: A Stylistic Commentary, University of North Carolina Press, 1993.

The introduction to the Latin texts of the speeches is
useful even to those who are not familiar with Latin. It
investigates the nuances of discourse and the interplay
of events and personalities during the civil war and
Caesar's subsequent return to Rome.