[Brooke&Ryan]

I looked at "Scaredy Dog" but it seemed to deal more with fear-aggression & that is not what Julius has at all. From the description of the book, it didn't seem to pertain to Julius.

When dogs growl at other dogs, lunge at people, and bark at everything it's often mislabeled as "aggression." But most aggression is fear-based and should be treated as such. The appropriate term for this constellation of behaviors is "reactivity."
This book helps the trainer and dedicated dog owner to understand the reactive dog and help him change for the better. The process is not an easy one, but once the changes begin to take shape, owners become so encouraged that the rest of the process suddenly becomes easy!

All training methods and classroom techniques are based on fun and on the development of a ‘working relationship’ with your dog. 125 pages, with over 50 photographs and illustrations to help you recognize and solve problems.

I'm leaning towards "The Cautious Canine" & "Help for your Shy Dog"