Zeldman is an idealist who devotes some of his book to explaining how much easier life would be if browser developers would just support standards properly (he's done a lot toward this goal in real life, as well). He is also a pragmatist, who recognizes that browsers implement standards differently (or partially, or not at all) and that it is the job of the Web designer to make pages work anyway. Thus, his book includes lots of explicit and tightly focused tips (with code) that have to do with bamboozling non-compliant browsers into behaving as they should, without tripping up more compliant browsers. There's lots of coverage of design and testing tools that can aid in the creation of good-looking, standards-abiding documents.