A Case for a creator

That's possibly because the textbook author didn't check facts very well. Experiments since 1953 using what are thought to be more realistic atmospheres make amino acids, too. Amino acids have been found in the chunks of asteroids that we call meteorites, and their mode of synthesis in the vacuum of space has been worked out. So yes, the text is possibly misleading about the Miller-Urey results - but that doesn't change the fact that there are known abiogenic routes to amino acids - and to simple sugars, purines, niacin....