The pace is very slow for the really basic stuff while more sophisticated techniques, such as correlated sub-queries, are not explained well enough.
There are numerous errors in the book which suggest the authors don't really know Microsoft Access. Clearly, some of the worked problems were only tried on paper and not through Access itself. Significant errors appear in the discussion of data types (pp. 58 - 81), joins (p. 105), calculations with dates (p. 145), null constraints (p. 282) and referential integrity (p. 288). The downloadable example database does not comply with modern database design protocols.
For a much better book, try "SQL Queries for Mere Mortals" by Hernandez & Viescas.