The discussion centers on the search for advanced texts on electromagnetic fields that utilize differential forms, specifically seeking resources that match or exceed the depth of Jackson's work. A recommended book is "Foundations of Classical Electrodynamics" by Hehl and Obukhov, which employs Cartan calculus. Other references include Ryder's quantum field theory text and Baez's work on gauge fields, though these may not provide the same level of practical applications or detailed calculations as Jackson. The original poster expresses a desire to explore electromagnetic fields from a topological perspective rather than focusing on calculations.