  Variants of the black hole information paradox are studied in Type IIB string
theory setups that realize four-dimensional gravity coupled to a bath. The
setups are string theory versions of doubly-holographic Karch/Randall brane
worlds, with black holes coupled to non-gravitating and gravitating baths. The
10d versions are based on fully backreacted solutions for configurations of D3,
D5 and NS5 branes, and admit dual descriptions as $\mathcal N=4$ SYM on a half
space and 3d $T_\rho^\sigma[SU(N)]$ SCFTs. Island contributions to the
entanglement entropy of black hole radiation systems are identified through
Ryu/Takayanagi surfaces and lead to Page curves. Analogs of the critical angles
found in the Karch/Randall models are identified in 10d, as critical parameters
in the brane configurations and dual field theories.
