This report describes experiments comparing reading performance such as reading speed and accuracy of tasks in reading to answer questions using different media: paper books, e-readers, and computer displays. As examples of reading of this kind, we considered two scenarios: seeking answers from text manuals and seeking photographs from collections. In two experiments conducted according to the two situations, participants performed tasks most quickly using a paper book or a PC. They had trouble flipping through pages with e-readers. Although the paper book was inferior to the PC in terms of turning over pages continuously with rapidity, participants performed flexible navigation with the paper book such as turning over pages from the end or middle of the book.