Yes that's definitely correct you need to know about the amygdala and its role in memory, in quite a bit of detail! The Grivas book definitely doesn't do it justice, so make sure you learn it for your exam.. It appeared on both the sample exam and last year's actual unit 3 exam!
Other areas that the Grivas book does not cover well include:
- The RAS and Thalamus
- Motion-after effect (it doesn't clearly explain that it is caused by neural adaptation, which was actually examined in last year's exam!)
- Strengths and Limitations of Forgetting Theories (you should know 2 strengths and 2 limitations for each theory!)
The rest of the book covers concepts pretty well, but the above areas definitely aren't covered properly. There are even more for unit 4! The examiners don't just use the Grivas textbook as a guide to what they'll exam. They use the study design, and some areas of the study design are not given enough attention in the Grivas textbook.