p. 212. Incorrect statement! The relationship between authors and books
is actually many-to-many. One author may have written several books;
one book may have several co-authors.
p.214. Caution. "you write..." should be "You write..."
p. 216. Doesn't the collection ID need to be made mandatory? Or does
AutoValue imply that?
p.248. Figs 263 & 265 contain the word "quanity"