Two interesting book on pattern recognition training have been written by Van de Oudeweetering.

I try to read a chapter a day. Just finished ch30 A Practical Piece Sac.

Improve Your Chess Pattern Recognition

There are 40 chapters, each with some lightly annotated games and also 40 exercises.

Chapter 1 A Very Powerful Piece: The Octopus(just a couple of the examples inserted with shortened notes)

Mellkumyan-Postny 

After 17..Nxe7(Diagram)

After 17..Nxe7

The Nd6 is Mr Octopus

Train Your Chess Pattern Recognition

The format is similar in this sequel with 37 chapters and 37 exercises.