  We consider the boundary value problem $-\Delta_p u = \lambda c(x) |u|^{p-2}u
+ \mu(x) |\grad u|^p + h(x)$, $u \in W^{1,p}_0(\Omega) \cap
L^{\infty}(\Omega)$, where $\Omega \subset \mathbb R^N$, $N \geq 2$, is a
bounded domain with smooth boundary. We assume $c$, $h \in L^q(\Omega)$ for
some $q > \max\{N/p,1\}$ with $c \gneqq 0$ and $\mu \in L^{\infty}(\Omega)$. We
prove existence and uniqueness results in the coercive case $ \lambda \leq 0$
and existence and multiplicity results in the non-coercive case $ \lambda >0$.
Also, considering stronger assumptions on the coefficients, we clarify the
structure of the set of solutions in the non-coercive case.
