I must say that I belong to the first group, I simply cannot concentrate on several at the same time, I want to give all my attention to one book and that is what happens when I start reading, I get so involved in the reading that I get completely immersed in it.
Currently I have read and shared reviews of: 4 Crimenes, 4 Poderes and Sangre en el Divan (which are books about police events that happened in my country), El Caballero de la Armadura Oxidada and currently the penultimate novel by Gabriel García Márquez Memories of My Melancholy Whores.