  We study reheating of inflationary models with general non-minimal coupling
$K(\phi)R$ with $K(\phi)\sim \sqrt{V(\phi)}$ where $R$ is the Ricci scalar and
$V$ is the inflaton potential. In particular, when we take the monomial
potential $K(\phi) \propto \phi^m$ with $m \in \mathbb{Z}_+$, we provide
general analytic expressions for cosmological observables. We consider a wide
range of non-minimal coupling $ \xi \in [0, \infty) $ in metric and Palatini
formalisms and derive the predictions for cosmological observables and the
reheating temperature taking a general equation of state parameter $
w_\text{reh} $.
