These days, at the request of a friend, I helped him look for some English e-books, and this was also the main reason why I had no time to update my blog recently. Indeed, I have accumulated a certain amount of English books, but most of these books were "encountered" rather than "found". How to "encounter"? Naturally, through an RSS reader, subscribing to quite a few Chinese journals + foreign material sites + overseas blogs, one would naturally obtain the download address of good books in the first (or second) time. However, "finding books" requires much more effort, yet there's no guarantee of significant results. This book search was like that; I was busy for several days without any decent results, and with limited skills, I truly feel unworthy towards that friend. However, I did seriously study Google Books, which can be considered a major gain.