Last year on Mystery Circus I asked for ideas for books for our one carryon bag trip through Eastern Europe and got fabulous ideas which made our trip terrific. Here it comes again if some new people might want to help us out. We will each carry two books. They must be slim paperbacks that we can interchange. No more than 3 of the 4 should be crime and preferrably 2 of the 4 since my husband does get tired of it. What four books would you take? No more than 250 pages please. We are aging travelers. Thanks for any suggestions.