Good Book(s) On The Clash Of Ali And Muawiyah رضي الله عنهما
In my opinion you must read 1) Research Paper 5B Waqia-e-KARBLA ka HAQEEQI Pas-Manzer 72-Saheh-ul-Isnad AHADITH ki Roshani Main by Engineer Muhammad Ali Mirza 2) Minhaj as-Sunnah an-Nabawiyyah b by Ibn Taymiyyah 3) Khilafat o Malukiyat by Abul A’la Maududi