I love this book and her teaching style, it has me actually taking my time to ensure I understand the material.
There are a few tiny errors I found in the book that had me working extra hard to make sure I understood the material.
On Page 20 Chapter 3:
Test Your Understanding #3, Determine the interval name, section h) 'D-G ascending' results in a 'perfect fifth ascending' (answer page 162). Its actually a fourth.
The last example in section h) on page 20 says Dx -F# (D double #) ascending, which I would guess a diminished 3rd and the answer page 162 says Dx - G# ascending as a diminished 4th. I think the dim 4th is correct for the G#.
I sent these to her for verification, so they might be fixed, but just in case....
She is awesome!