I read 36 books last year. Most of them were 300 pages or less. This year, I'm going to try reading at least 18 books, some of them being more than 300 pages long or rereads. I think that reading that many books will improve my retention.
Furthermore, I usually "study" philosophical and political texts. This year, I will try to look for some novels.
I chose to read "Reform or Revolution" by Rosa Luxemburg this week. I’ve just finished it today. It’s a very interesting book, with a critical perspective on capitalism, militarism, and reformist “socialism.” It should be remembered that Rosa was also against authoritarianism.