Subtitled 'The Complement to Prisma'. Often erroneously called Prisma 2 as it is the same colour and has the rarer and lesser known remedies not found in Prisma.  The confusion started when the book changed its colour to purple so as to go with Prisma. 

This book began life as the second volume of the Synoptic One beginner's book with a similar but duller silver shade. However we would suggest all first year students wait until their second year before taking the plunge.

Admittedly this is a good source of information on the less tried and tested, and also the newer remedies.