I’d love to read more books in a club environment, but I also know I’m not exactly the target membership of a beginner’s book club so I think I should temper my input.
That aside though, I think an important thing to point out is that because books take a lot more mental energy, motivation is a lot more important. 時をかける少女 is something of a rare example because it has super broad appeal - a lot of people already owned it before the club started! Finding more like that might be difficult. On a personal level, I know I could probably read one volume of whatever manga even if I don’t care, but read an entire SAO light novel? Uhhhhh nnnoooooo?
(Not hating on the many people here who ARE reading SAO)