Amino acids in human cancer cells expose dextrorotation?
I took a 30 second look at the book you mentioned. The authors just made this up, just like 95% of the book. 

The authors are not wrong, they didn't want to write something useful and made a mistake, they're just bullshitting: They're making stuff up, letting it sound a tiny bit scientific and try to sell a lot of books.

If you want to know more about something, usually Wikipedia is a good place to start, and if you're not sure how to distinguish between science and pseudoscience it might be a good idea to read a bit about recognizing pseudoscience. 

Now to answer your question: cancer cells are almost the same as normal cells, and they contain mostly levorotatory amino acids. The main difference between a cancer cell and a normal cell is that the cancer cell has one or more mutations that cause it to divide a lot more than normal cells. The DNA, proteins and small molecules in the cells are mostly the same as in normal cells, that's why it's so hard to specifically kill cancer cells.