If you're a scholar of Latin, especially the Early Middle Ages, then you need this book. It's where I turned if I couldn't find a word in the Oxford, or Niermeyer's. ( )

Not a bad book, but generally unnecessary. If you are reading Late Latin, you most likely are using a major Latin dictionary in tandem with this, either the Oxford Latin Dictionary or the Lewis and Short. For someone specializing in this period, the only dictionary you should be using is the L&S, and it covers everything in this book and in greater detail. If you mean only to dabble in Late Latin and are primarily a classicist, this is an acceptable addendum to the Oxford Latin Dictionary, which frustratingly stops its coverage at 200 AD. Generally though, this book is unnecessary. ( )