The Scandinavian is a rarely employed opening on the highest level and guides your opponent on much less familiar terrain than for example the Sicilian, French or any 1.e4 e5 system. This rareness leads to a slow evolution of theory and avoids the need to permanently refresh your knowledge on the latest developments. Don’t hesitate long and make the Scandinavian your opening weapon.
Strike First with the Scandinavian - Christian Bauer
Here is an opening for Black which will furnish good results in the shortest possible time.
The Scandinavian - The Easy Way - Andrew Martin - 2nd Edition
On his new DVD Sergei Tiviakov shows you everything you need to know in order to be able to play 3...Qd6 yourself, right away.
Scandinavian with 3...Qd6 - Sergei Tiviakov