"without being so engaging that you can't put it down"
I find re-reading (good, entertaining, no too serious) novels that I have already read before, works best. Since you have already read the thing previously, it's easier to put it down in the middle.
I find re-reading (good, entertaining, no too serious) novels that I have already read before, works best. Since you have already read the thing previously, it's easier to put it down in the middle.