I loved this book. Hackers & crypto & dystopian recent-future setting- it's like Doctorow wrote it with me in mind. There's plenty of Heinleinian preaching about freedom and responsibility, which is always a plus. The story is all too believable, the characters brighter than average. The parents, as usual in the books I've read lately, are plenty dim, but one overlooks this. The San Francisco setting worked well on a lot of levels, as did the weaving in of civil rights, hippie and Yippie history. Highly recommended.