:6:::(exception:invalid index)(AnyType)::0:0(AnyType)
0:0:::1:authors(ListType)::1:<list>(ListType)
1:0:::1:extras(DictType)::1:<dict>(DictType)
2:0:::1:pages(IntegerType)::1:0(IntegerType)
3:0:::1:price(DoubleType)::1:0.000000(DoubleType)
4:0:::1:publisher(ObjectType)::1:<>(ObjectType)
5:0:::1:title(StringType)::1:(StringType)
