Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 12 2 2025 11 12 Thermodynamics and Multi-Horizon Solutions in Quartic Quasitopological Gravity: A Power-Maxwell Approach 163 178 1952 10.22128/ijaa.2025.3009.1220 EN Afsaneh Bazrafshan Department of Physics, Jahrom University, Jahrom, P.O. Box 74137-66171, Iran Mohammad Ghanaatian Department of Physics, Jahrom University, Jahrom, P.O. Box 74137-66171, Iran 0000-0002-7853-6767 Parviz Mirsalari Department of Physics, Payame Noor University (PNU), P.O. Box 19395-3697, Tehran, Iran Ghasem Forozani Department of Physics, Payame Noor University (PNU), P.O. Box 19395-3697, Tehran, Iran Journal Article 2025 08 05 We derive exact black hole solutions in $(n+1)$-dimensional fourth-order quasitopological gravity (4QTG) coupled to power-Maxwell electrodynamics. Thermodynamic properties (entropy, temperature, electric potential) are analyzed, verifying the first law. Crucially, thermal stability is \textit{exclusively} achievable in asymptotically AdS spacetimes, while dS and flat solutions exhibit universal instability. The study reveals that 4QTG supports multi-horizon black holes even without charge—a feature absent in Einstein gravity—due to repulsive effects of quartic curvature terms. These results highlight the role of higher-curvature corrections in resolving classical limitations of general relativity and provide new insights for AdS/CFT correspondence. https://ijaa.du.ac.ir/article_1952_ddb1f2a92aefb6e6fc8dafc54f82dbe6.pdf