The World of Null-A
The World of Null-A , sometimes written The World of Ā , is a 1948 science fiction novel by Canadian American writer A . E . van Vogt . 
<triplet> The World of Null-A <subj> A. E. van Vogt <obj> author <triplet> 1948 <subj> 1948 <obj> point in time <triplet> A. E. van Vogt <subj> The World of Null-A <obj> notable work <subj> science fiction <obj> genre