I was doing some collection development research and used "black hole" as a keyword search in our catalog and retrieved four* hits:
State-building: governance and world order in the 21st century
Black hole at the center of our galaxy
Simply Einstein: relativity demystified
Black hole tariffs and endogenous policy theory: political economy in general equilibrium
I'm trying to decide if I should read anything into the fact that the titles are evenly divided between scientific theory and political titles concerned with ideas like 'Weak states and the black hole of public administration'....
*For those worried about the state of our collection, "black holes" (plural) as a keyword search retrieves 33 hits.