I think that is the crux of the whole argument. I would have agreed with you. I think I regret saying that Absolute Truth and Objective reality are the same thing. Here is where I may be being a moving target. My book analogy was more whimsical than helpful.
Objective reality has objective, true properties.
For instance, objective reality has the property that the speed of light in a vaccuum is constant and equal to c. I'd like to call those true properties, not my imperfect statement of them, Absolute Truth. I suppose I could also say that it could be compared to OR, but that seems cumbersome in other cases, such as the one below. When it is true within a specific context. Jason is 10 feet tall.