This is volume thirty-two in the Single series. This is a thin book with no text other than photo captions. The book contains very nice 1/72 and 1/48 scale drawings, B&W photos of various details and pages from the manuals showing different systems. There are also two color photos of cockpit details.

This book covers the jet version of the SAAB J 21A. Sweden took the piston powered J21A and modified it to take the De Havilland Goblin engine. The J21R was one of one two aircraft successfully converted from a piston engine to Jet power. Sixty-four were built and served with the Swedish AF. The biggest drawback was the limited range on internal tanks of 280 miles.

Helion produces books on many aspects of Military History from the Late Medieval period through to the present day. Helion was established in 1996, and since then they have published almost 1,200 books, with 100 or more new titles coming out every year. The 'Africa@War' series covers African military history since 1945.

Stephen Edward Rookes is originally from Exeter in the UK, Dr. Stephen Rookes is a French writer and academic who earned his PhD from the University of Toulouse Jean-Jaurès, France. He specializes in the history of Cuban exiles and takes a particular interest in the CIA's covert operations in Central America and in Africa. This is his third instalment for Helion’s @War series.

This volume in MMP’s “Single” series covers the Avia S-199, and with the impending release of Eduard’s 1/48 kit (announced, but I have no idea of when), the timing of this publication is perfect. The idea behind this series of books (more like booklets) seems to be to get right to the point and show scale plan views, photos, profiles, etc.