Miguel is right that when starting out in studying the Romans it is best to start with the basic stuff rather than the academic works.
A few examples would be the series of books published by Peter Connolly for Oxford Publishing. The books (Ancient Rome, Pompeii, The Tiberius Claudius Maximus series) are written for beginners in a simple and easily understandable form. As a bonus the books are also well illustrated, showing how buildings, fashion, weapons etc looked like during that era through Mr. Connolly's excellent illustrations.
An Academic work by Peter Connolly that is worth reading is 'Greece and Rome at War' - which details the arms, armour and battle tactics of the Classical World.
Other excellent books include Robin Lane Fox's 'The Classical World: An Epic history of Greece and Rome';
'Handbook to Life in Ancient Rome' by the Adkins Brothers; any book by Adrian Goldsworthy; The Chronicle of the Roman Republic/Emperors series (which Cato reviewed a few days ago); books by Michael Grant (History of Rome, Gladiators, Fall of the Roman Empire etc); titles in the Fontana History of the Ancient world (Roman Republic, Roman Empire, Later Roman Empire).
Other books about the Later Roman Era that are worth a look ae 'The World of Late Antiquity' by Peter Brown, The Mediterranean World in Late Antiquity' by Averil Cameron.
For futher research it is also worth getting Classical History books published by Oxford and Cambridge universities.