The dominance of CKM-suppressed and/or one-loop transitions makes charmless
hadronic B decays excellent processes to test the Standard Model (SM).
Several (possible) deviations from the SM, "puzzles", have been seen in
these processes; they could indicate new physics or would otherwise improve
theoretical understanding. Searching for and resolving "puzzles" in
charmless hadronic B decays plays an important role in heavy-flavor physics.
My talk will present recent contributions from BaBar to this field,
including Dalitz plot analyses of $B\to K\pi\pi$ and searches for $B\to PP$,
$PV$ and $PA$, where $P$, $V$ and $A$ denotes a pseudoscalar, vector and
axial-vector meson, respectively. Measurements of direct CP asymmetries will
be also presented where they are available.