Double Trouble is a straightforward volume of repertoire recommendations, easy to understand and easy to play. The book is in three parts. Part One, besides introducing the book generally, covers the very first moves of the Scandinavian Defense and White’s early deviations. Anyone who plays the Scandinavian will find this section quite helpful. Then Part Two covers Qd6 + g6 systems, while Part Three covers the very different Nf6 system. Pictures 2-3 show contents of the book.