1. Introduction to hybrid nanofluids 2. Preparation and stability of hybrid nanofluids 3. Thermophysical, electrical, magnetic, and dielectric properties of hybrid nanofluids 4. Hydrothermal properties of hybrid nanofluids 5. Rheological behavior of hybrid nanofluids 6. Radiative transport of hybrid nanofluid 7. Theoretical analysis and correlations for predicting properties of hybrid nanofluids 8. Brief overview of the applications of hybrid nanofluids 9. Recent advances in the prediction of thermophysical properties of nanofluids using artificial intelligence 10. Challenges and difficulties in developing hybrid nanofluids and way forward