Complex sentence: This exhibition was the occasion for the artist to write a bilingual book "Over the Rainbow, Ay-O Restrospective 1950-2006," providing probably the best overview of his work: a welcomed addition to an otherwise stealth bibliography on the Rainbow Artist.
Split into simpler sentences: This exhibition was the occasion for the artist to write a bilingual book "Over the Rainbow, Ay-O Restrospective 1950-2006," providing probably the best overview of his work. A welcomed addition to an otherwise stealth bibliography on the Rainbow Artist.