Yes. It's a general problem with VxWorks writing. There is is only one
book that I'm aware of written by people who knew diddly about VxWorks,
and they decided to abstract away most of the VxWorks-specific info that
they started with.
That book is called "Real-Time Concepts for Embedded Systems" by Qing Li
and Caroline Yao. And I'm not really recommending it. It's merely the
least bad book that I've seen relative to VxWorks.
Here's the Amazon reference: