If you can find it, Lorraine Boettner's book
Roman Catholicism has some good stuff in it, particularly regarding doctrine. However, the timeline at the start of the book showing when various Romish practices began has been debunked by Catholics. Also, the church described in it is the pre-Vatican II church, which was far stricter than the post-Vatican II church and its ecumenism.
I know it's not from the 20th or 21st century, but the best book I've come across refuting Romanism is
A Manual of Romish Controversy by Anglican minister Richard Paul Blakeney.
It is available for free at the Internet Archive. Since the book was written before 1870 when papal infallibility was proclaimed a dogma, it outlines the various views of infallibility at that time, showing that the Romish claim that the church has always believed in papal infallibility is nonsense.