If Big Sky remains a mystery to majority of readers, to those in the know, the work of Philip Guston serves as one of the press's signature features. The mingling of text and image is an important part of Big Sky magazine with Guston at the forefront. So it is no surprise that Guston would collaborate with Berkson by providing illustrations for Enigma Variations in 1975, in a run of 1000 copies. In an interesting side note, Between the Covers has a copy of the chapbook signed by Berkson to artist Jane Freilicher and her husband Joe Hazan. A pretty cool association for just over seven bills.