Kodansha's Katakana Workbook: A Step-by-step Approach To Basic Japanese Writing

This companion volume teaches the basics of katakana, the script for writing loanwords borrowed from English and other languages. The book introduces the characters not in the traditional a-i-u-e-o order, but in a radical new one that allows students to sound out words from the very first page.
As in the Hiragana Workbook, one page each is devoted to the 46 basic characters, which are then used to form actual, everyday words, enabling the student to build his or her vocabulary from the very beginning. The Katakana Workbook also features exercises, flashcards, games and free audio downloads.