Booklog API (limit 100 items?)

booklog.rb

require 'open-uri'
require 'json'
arg = ARGV.shift
if arg.nil?
  print "usage: $0 username\n"
  exit
end
username = arg.strip
api_url_fmt = "http://api.booklog.jp/json/%s?count=10000"
api_url = sprintf(api_url_fmt, username)
open(api_url) do |io|
  h = JSON.load(io)
  h['books'].each do |book|
    print "#{book['asin']},\"#{book['title']}\"\n"
  end
end