Over the past century, tonnes of good books and papers have been published on E&M in general and radio and radar (and sonar) in particular. Here are three #radar textbooks for three levels of interest in the subject:
• "Introduction to Airborne Radar", Stimson—for non-#EEs without E&M background
• "Principles of Modern Radar" Vol 1 & 2, Richards, et al.—for EE students
• "Design and Analysis of Modern Tracking Systems", Blackman—for EEs
Amongst the few radar books with which I am familiar (I am not a radar expert), the most balanced presentation is found in the two-volume set by Richards, et al. Stimson's is too shallow and Blackman's too deep. (I have not read Skolnik's books.)
And my favourite EE undergrad intro textbook on E&M is this classic:
• "Engineering Electromagnetics", Hayt—one of the most accessible texts on the subject for EE students