Trying to distinguish between the two Physical Chemistry books written by Raymond Chang? Here is a quick comparison.
Physical
Chemistry for the Chemical and Biological Sciences, aka Big Blue,
weighs in at @1000 pages. It covers the standard topics in physical
chemistry and is suitable for a year-long course. Because the book provides many
applications to chemical and biological systems, it has also been used in a
one-semester course mainly for premeds and biochemistry majors.
Physical Chemistry for the
Biosciences, aka Baby Blue, is 
@700
pages. It is specifically designed for a one-semester course geared toward
students who are interested in the biological sciences. It is considerably
shorter than the first text, due to the omission of topics such as solid and
liquid states and statistical thermodynamics, and it has more of a biochemical
emphasis.
Both books are carefully designed, student oriented and highly readable with ample references and end-of-chapter problems. And both books have an accompanying Solutions Manual.
