The Logic of Life is an economics book in the vein of Freakonomics. It provides logical explanations of seemingly illogical behaviors by people. In many cases, psychological studies tease out logical behavior from seemingly illogical outcomes.
One example was the discussion of racism. "Bigoted racism" would be expected to weed itself out of the business world. If businesses that turn down the best candidates merely because of external characters, would suffer and falter. (A simple example could be seen in basketball where all white teams became at a significant disadvantage compared to integrated teams.) However, "rational racism" is much more difficult to remove because it does provide some "stereotypical" advantage. On average members of certain groups will do better, therefore companies are more likely to hire those in the group. Those in the "out group" still suffer, but companies that practice it are still successful, thus making it more difficult to remove. These groups can also self-reinforce their standing. A Catalan who studies computer science rather than Catalan may be shunned by his community for attempted to do something outside the community. This leads to fewer people being willing to study and succeed and thus an overall reputation of community being inferior. Once the group is deemed inferior, a logical company would prefer the stereotypically better group, and thus perpetuate the inferiority.
Similarly, devolution of areas to isolated ghettos can be explained by a logical behavior. A perfectly integrated community may be functioning well. Each resident likes to have a certain number of similar people nearby, and that balance is properly met. However, if one resident moves out and is replaced by a "different" person, that could upset the balance. Now one person feels they are too different, and move out, this starts the chain reaction which results in the community dominated by a single group.
There are a number of additional examples in other areas of logical explanations for something that seems illogical on the surface. Groups can do strange things when they are composed of individuals doing "logical" things.
A young boy works with his dad in maintenance at an exotic and very posh hotel. The owner amassed a huge fortune and felt it was important to make all sorts of wacky inventions. In the course of the book, the boy goes through a quest where he learns more and more about the hotel and eventually discovers who is sabotaging it and what the future will be. He also finds a new friend and prepares himself for future leadership roles. The hotel turns out to be a kid's dreams with rooms ranging from "life size pinball machine" to a recreation of central park (along with many "secret" rooms in between. Ducks are also very important. The story is devoid of extreme drama and engaging for young readers.
Fooled By Randomness explores the importance of random events in life and society. On the outset, the author states that he wanted this book to be fun to write, and tried to avoid too many citations. He does cite some literature, but more often he helps provide alternate explanations for results. For example, many studies have tried to tease out what makes successful businessmen. Intelligence is not seen as super important. However, the propensity to take risks does stand out. However, if you looked at bankrupt businessmen, you may see similar results, likely with an even higher "risk taker" rating. The highly successful may appear to be average because they are. They just happened to get lucky. The finance world tends to revere the young, successful traders. However, finding the next "big shot" is essentially a crap-shoot. One person may take risks and get lucky. However, many others will not have the same luck. An older trader is probably your best bet, because they have managed to survive for a long time without imploding.
The Logic of Life is an economics book in the vein of Freakonomics. It provides logical explanations of seemingly illogical behaviors by people. In many cases, psychological studies tease out logical behavior from seemingly illogical outcomes. 
The Go-Giver uses the common business book trope of a salesman meeting with a "guru" to gain insight in ways to improve his career. Alas, the meetings do not help him to meet his original sales quota, but it does serve as the jumping point to his new career.
Messenger is the third and shortest book in the Giver Quartet. It follows more closely with the second book, and only superficially connects to the first and forth book. The series feels like two separate ones. Giver and Son go together, while Messenger and Gathering Blue are tied together. Had they been marketed as such, the reading experience would be much less frustrating.
The end of The Giver left many questions unanswered. You would think the sequel would fill in the blanks. Alas, in that you would be mistaken. (Try "Son", the fourth book in the series.) Instead, Gathering Blue takes us to a totally different area of the same "Giver" world. A young girl has a special gift, but also a physical abnormality. She is brought into the castle to serve with others. She learns that though she is treated well, she is also being "imprisoned" to have her talents used for the benefits of others. She eventually discovers her father and leaves. In some ways it is a repeat of the Giver, with a similar story arch in a very different community. Other than preparing us for the community of the fourth book, the second book is not critical in the Giver series.
Ninety Percent of Everything provides insight into the shipping industry. Today, it is often so cheap to ship things long distances that we think nothing of buying "cheap junk" from halfway around the world. However, things still need to travel across the ocean to get to us. The focus of the book is the ocean travel. The author spends time with a ship crew to experience shipping first hand. Crews typically come from less developed countries, where the wages from life at see can allow their family to live quite well back home. We also get plenty of coverage of the Somali pirates and possible reasons for their behavior. Alas, with the focus on the people at sea, there is not a whole lot of coverage of the whole logistics of the operation.
Unexpected "shocks" to the normal way of doing things can often help spark the creativity needed to accomplish something truly amazing. Messy opens with the story of a jazz pianist that was going to walk away from a performance due to the poor condition of the piano. However, as a special favor to the promoter, the pianist performed and produced one of the top performances of all time. The condition of the piano forced the pianist to improvise and go out of the "comfort zone" and produce something great.
After meandering around a few other side stories, the Giver series finally returns to the original story line in the conclusion. Son starts out in the same village as the Giver. We follow the story of a girl who became a birth mother. We gradually learn that she had lived at the same point in time as the Giver. She had a difficult birth and was then reassigned to a different job. However, in reassigning, they had forgotten to give her the "pills" that cut off emotion. She had the yearning to see her son, and eventually found him at the nurturing center. After he Jonas flees with baby Gabe, she ends up boarding a boat and ending up in another village. There she discovers a society vastly different from her own. (It somewhat resembles a somewhat primitive society with little technology, but a degree of learning and understanding.) From there, she builds up strength to climb out and find her son. Alas, she makes a great trade with the Trademaster and loses her youth in exchange for seeing him. She doesn't let him know until near the very end.
What are fifty inventions that helped shape the modern economy? This book doesn't attempt to find the 50 most important inventions, but 50 that have had impact. Some of the things are classical physical inventions like the plough and plastic. Others like management consulting and Seller Feedback are modern, abstract innovations that are important to our economy. There are also cautionary tales. Attempts were made to ban leaded gasoline in the 1920s. However, lobbying get it going for another half decade before it was eliminated. What other things in our current society are still being forced upon us by the regulatory framework and inertia. (Cars seem to come to mind.)