Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Rip-roaring plot.

NIGHTMARE IN SHINING ARMOR happily continues the Den of Antiquity series. In fact, it's one of the smoothest and most fun in the comic mystery series that began with LARCENY AND OLD LACE. The rip-roaring plot is lots of fun. The book is easy to read, flows quickly and smoothly, and has a fullness and a completeness to it. In other words, it's a satisfying read. But a surprise plot turn makes you wonder -- is this the end of the series? But no! Check out the next one: SPLENDOR IN THE GLASS. Nicely done.