'kafka...' is a great read. long, like 'the wind up bird chronicle', but more satisfying.
'pinball 1973' and 'hear the wind sing', his first novellas, are very short and evocative. these two introduce and establish characters that seem to visit most of his work.
have you read either 'dance, dance, dance' or the non-fiction work 'underground'?
there's also an anthology of short stories (in english) coming on august 29th.
one of, if not my favorite contemporary writers,
-e-
ps: 'hard boiled wonderland' is so odd because the writer attempts to create a complete subterranean world that just loses the reader (IMHO).