how about 你覺得怎么樣?
同義的問法有：what about
what do you think of
此外,如果后面是動詞的詞組的話,還可以用why not,why don't you,也是表你覺得怎么樣,這里有反問的意思.
所以說,具體的答案就是：
How about this book?=What about this book?= What do you think of this book?
望樓主采納.