Regards,
I often read books in parallel. I'll read a chapter from one and move on to the next book. I will do this with several books at a time. After I read a chapter with the current book, I put it on the bottom of the stack (that I'm reading) and start again on the next one. I seem to finish books faster that way.
When I finish a book, I just add another to the active stack.
It makes sense when you think about it. Most people who watch television have no problem keeping up with storylines on the various shows that they watch.
Anyway, my current stack consists of "The Lions Of Lucerne" by Brad Thor, "Pelican Brief" by John Grisham (second time reading this), "Murder One" by William Bernhardt, "Storm Of Swords" by George RR Martin, and "No Exit" by Taylor Adams.