Committing almost fifty hiragana to memory by "brute force" is difficult, never mind the Katakana, and (gasp!) the dreaded Kanji... To accomplish this feat of memory, a person must use a system of mnemonics, and hers is such a system pre-packaged and awaiting use. This book can teach anyone with the inclination to read the Hiragana and Katakana systems, and I cannot express enough how useful this book has been in helping me.
The author's boast that the Hiragana can be learnt in just six hours is not an idle one - I did in less, and I have a brain like a sieve! The inspired element is that of breaking the hiragana down into construct of symbols, and creating for each a zany story, usually relating to the character's phonetic value. It works! The process is only slightly hindered by the fact that the author is American - relating the Hiragana character for the sound "A" to the word "otter" and the character "Sa" to the word "Sock" are telling examples, but there aren't many of these, and the affected characters are some of the most memorable in the Hiragana system.
This is a great book - the system is explained and undertaken with simplicity and straight-forwardness, without any confusing asides. It shows Hiragana and Katakana for the immensely logical and beautiful systems they are. Usefully, the page for each character has additional information which may be ignored or picked up later at the student's leisure on different type faces (which is not unimportant - the type face can radically alter the appearance of the character,) but the pages are laid out as logically and as clearly as the argument, and there is no room for confusion. On each page there is a small section testing you on the characters you have learned, and the cover of the book is designed so it can fold over the answers until you're ready for them! Little touches.