BLUE-SKY • DICTIONARY ONE.COM • Definition of Blue-sky

... deceived in this book. It is nothing but a handful of rustic variations on the old tune of "Rest and be thankful," a record of unconventional travel, a pilgrim's scrip with a few bits of blue-sky philosophy in it. There is, so far as I know, very little useful information and absolutely no criticism of the universe to be found in this volume. So if you are what Izaak Walton calls "a severe, sour-complexioned man," you would better carry it back to the bookseller, and get your money ...

— Little Rivers - A Book Of Essays In Profitable Idleness • Henry van Dyke