Reading about Abrahamic religions

[mtbc]

I am reading a book that describes various aspects of the largest Abrahamic religions. So far it has discussed them fairly separately, which means an odd diversity for me in how it feels to read it. I know Christianity well, I have had easy opportunities to find out about Judaism, less so with Islam, though, by odd coincidence, one of my neighbors studied Islam a bit in college. It is curious to experience a book that keeps shifting me between comfortable familiarity, passing acquaintance, and considerable ignorance.