This is the sixth installment of the Militaria in Detail series.  The text does not go into much detail on history or combat usage but it does point out some interesting details.
The first part of the book covers an early production Ram II preserved in Vancouver, Canada.  Eleven  photos are provided by Wojciech Luczak, a photographer better known for combat photos.  As a bonus, two pages are dedicated to a four view 1/35th scale plan set with a period photograph.
The Second part covers the Sexton in great detail.  62 photographs cover this possible Italeri M7 Priest conversion including the interior.  Enough pictures of the gun are included to detail Tamiya's 25 pounder to fit the bill.
Again, a four view 1/35th scale plan is included.
The last third of the book covers the Canadian M4A1 variant, the Grizzly.  Again, like the Sexton, the author was given complete access to the example at the Polish Army Museum (Czerniakowski Fort, Warsaw).  44 photos cever all details with the interior as well.  Perhaps a major manufacturer will give us new tracks, idlers, and drive wheels to convert DML's M4A1?
This book is highly recommended.