The Long Haul:
Book Description 

A family road trip is supposed to be a lot of fun . . . unless, of course, you're the Heffleys.
The journey starts off full of promise, then quickly takes several wrong turns. Gas station bathrooms, crazed seagulls, a fender bender, and a runaway pig-not exactly Greg Heffley's idea of a good time. But even the worst road trip can turn into an adventure-and this is one the Heffleys won't soon forget.
 
Cabin Fever:
Book Description 

Greg is obsessed with the Net Kritterz, which is a popular gaming website. However, very soon Greg realizes that the next features of this website are unlocked only by paying money. Hence, to enjoy the paid features of this website, Greg looks to find some money making ideas. His friend Rowley helps him in this conquest. However, all their plans of generating money fail miserably leaving Greg in a not so ideal situation. This frustration forces them to start the Neighborhood Tattler, a tabloid newspaper.
Things then go from bad to worse as their newspaper is not generating enough advertisements which prompts them to think about starting their own holiday bazar. Greg tries to advertise about his products through posters but that plan backfires as the ink he uses in these posters is washed thanks to the rains. This act gets covered by community newspaper which leaves Greg in all sorts of trouble. How will he get away from all these troubles? Or is there more to the story?