Known Typos
List of typos can be found here:
http://www.hep.phy.cam.ac.uk/~thomson/MPP/ModernParticlePhysics_Errata.pdf
Problem 2.16 (Page 57): In deriving the S^2 operator, the expressions should be the Pauli matrices, and not the "S" operators, which already incorporate a factor of 1/2.