The present study was designed to probe pedagogical viability of extensive reading as an effective alternative in English reading instruction. To accomplish the purpose, an English book club was formed, consisting of 40 high school students. The book club activity was held during four months of summer and winter vacations in 2009. The participants were encouraged to freely write anything in their reading logs they felt while reading. The reading logs and interviews were analyzed. They revealed effects of extensive reading and changes of the readers' cognitive and affective reading processes. According to the results, 1) extensive reading has potential to be a successful alternative in English reading instruction; 2) the readers could experience “amusement” and “absorption” by reading sufficient books with the i−1 level; and 3) extensive reading enabled them to choose their ways of reading and to be responsible for their choices.