Eutropius, various selections of Caear, and various Catullus poems are fairly easy. As far as Vergil goes, Pharr's Aeneid will make it a lot easier. Generally, the dramas are difficult, but I think the Maenaechmi
and the Phormio
are sometimes read in the schools.
This beginning Latin Poetry reader is excellent http://www.amazon.com/Beginning-Latin-P ... 865&sr=8-1
. There are notes, a dictionary, and translations. The readings are labeled 1-4 in terms of difficulty. And everyone is included: Horace, Catullus, Ovid, etc. I have used this book with my students in the second semester of Latin II with no difficulty. It is cheap. So get it and then branch out.
Also, try these transitional readers from Balchazy. http://www.bolchazy.com/index.php?cat=latin&sub=4
These books, however, are all "cut." But you will need to read a "cut" book. If you try to read 12 books of the Aeneid, you will not finish for a year or two.
When a true genius appears, you can know him by this sign: that all the dunces are in a confederacy against him. ~Swift