Too long in my opinion. There is so much knowledge and fun hidden in all the books that exist, and it mostly annoys me how long it takes me to read them. Granted, I read everything in English rather than in my native language (unless it's a German book of course), but I'm having a hard time chewing through the Feast for Crows novel, despite finding it interesting. On the other hand, I could casually read the first Hunger Games book in a couple of evenings. I have a huge reading backlog, because of the many recommendations I get, and I'm sure I would never run out of interesting books to read in my entire lifetime, yet it takes me ages to finish books sometimes, even if I like to read them. One of the reasons is that I can't read for a long time in one go, I prefer reading a chapter and then doing something else, maybe 2-3 chapters (depending on length) or more, but very rarely and only if it's super engaging. Another reason being that my reading speed feels really slow, especially when I can't shut off my inner voice, which slows you down drastically. But it's also a bit my own fault, because I don't really take my time for reading, with all the games to play and series or movies to watch nowadays. I'm sure at least that will change in the future.
One word: Audiobooks. I listen to them while driving. I listen to them while riding my bike. I listen to them while wiring racks. I listen to them while cleaning house. And I listen to them at 1.5x. I rarely have time to sit down and read a book. but the bike ride down to Torrance and back will get me three hours of something - which, with a book like Rendezvous with Rama is 3/8ths of the thing.
My favorite audio book has to be The Dark Tower series. I listened to it in NYC over the course of a couple years. You forget how an hour or two walking / subway adds up. George Guidall read first two. His voice was like magic. I still get flashbacks sometimes. Like right now. I listen to a section of that and I'm walking back through Brooklyn in the middle of the summer and I can smell NYC again. Then, Frank Muller took over. He just takes it to a whole new level.
My wedding coincided nicely with the Swine Flu panic. And I had my one and only zombie apocalypse script to write. So instead of having a bachelor party, I took the 1 from Santa Monica Blvd to Astoria in my Dodge Stealth, taking it as slow as I wanted. Ended up taking five days. I listened to the Left Behind series the whole way. Fantasy might be graded on a curve, but it's a whole 'nuther hyperbola from the Jesus stuff. Man, what a bunch of stinkers.