This is an opportunity for me to advertize Robert Criss book, "Principles
of Stable Isotope Distribution".  Oxford Univ Press; ISBN: 0195117751.

This is a great text that covers everything in Faure (at least, everything
to do with light stable isotopes) with a lot more attention to basic
principles, discussion of molecular physics, etc.  I plan to use this is
isotope classes I teach in the future, including those that include
systems such as Rb/Sr that Criss does not discuss.  Just an example: I
took a long day to go through the detailed development of isotope
fractionation and the meteoric water line / temperature relationship from
first principles (thermodynamics, etc.).  I wanted to make sure I had
everything absolutely clear for a class I'm teaching.  Only to find a
couple of weeks later that Criss' book does it very elegantly and would
have saved me some time.  This is the clearest discussion of the subject I
have seen.  There are a lot of other gems in this book as well.  I cannot
recommend it more highly (I must note there is a bit of a diatribe against
"global change researchers that don't know any mathematics" that could
have been left out of the introduction.  Please ignore this, because it is
a truly great text).

Eric Steig