Jeff,
I do not have the book, but here is my for must have dubbings:
Spiky Squirrel
natural gray
dark brown
natural fox
Hares ear
natural
tan
olive
chocolate brown
insect green
Black
Dry fly/superfine
chocolate brown
sulphur orange (in east)
PMD (for you western guys)
Adams gray
olive
tan
insect green
black
Ice dubbing
orange
UV brown
chocolate brown
I am sure that there are a ton more out there that are must haves, but when right off the top of my head I could tie most of the flies that I make with these dubbings