  We present recent lattice results on QCD thermodynamics at non-vanishing
baryon number density obtained from a 6th order Taylor expansion in the
chemical potential. Results for bulk thermodynamic observables, in particular
for fluctuations in the baryon number density, are found to be well described
by a hadron resonance gas model at low temperature and an ideal quark gluon gas
at high temperature. We also analyze the radius of convergence of the Taylor
series and discuss the information it provides on the occurrence of a second
order phase transition point in the QCD phase diagram.
