Could you recommend any exceptional books that are translated into English about the Battle of Karbala, the biographies of the 12 imams, or the previous Prophets?
As mentioned already, al-Islam.org has an extensive library concerning all kinds of topics related to Islamic matters, so browse the library to find answers to your questions.
In particular, I suggest you to check the sections below.
Battle of Karbala:
https://www.al-islam.org/tags/karbala
https://www.al-islam.org/tags/muharram
Biography of the 12 Imams:
You can find an ample selection of texts about the Ahl al-Bayt ('a) here -
https://www.al-islam.org/tags/ahl-al-bayt
In particular, I recommend the following texts:
https://www.al-islam.org/brief-history-fourteen-infallibles
https://www.al-islam.org/fourteen-luminaries-islam-ahmad-ahmadi-birjandi
Otherwise there's plenty of biographies of each individual Infallible ('s) on Al-Islam.org.
Previous Prophets:
https://www.al-islam.org/tags/prophets
In particular:
https://www.al-islam.org/hayat-al-qulub-vol-1-stories-prophets-muhammad-...
InshaAllah this helps.
Fi aman Allah
