This book is amazing, it should be mandatory to anyone learning Japanese. If you're struggling with your first hundred Kanji give this one a try, it's well worth it. The story is cute and the mnemonics are clever and memorable. Often times I catch myself remembering good chunks of the story when I'm trying to recall a certain Kanji, and it helps tremendously!
Granted, this will not magically make you a pro at Kanji, you still need to put in the work. But the book, paired with the included Anki deck has allowed me to know (or at least be familiar with) around 150 Kanji in under a month! I will continue to review the Anki deck regularly for the foreseeable future to make sure the Kanji are firmly locked in my long-term memory.
I always thought Kanji were these random scribbles with no real logic behind them, but after reading this book I can now see that they're extremely logical and make a lot of sense. Once you understand these first building blocks you start to realize that even complex-looking Kanji are mostly made up of other parts or kanji you might already know, allowing you to grasp their main meaning.
I cannot praise this book enough, I just wished there were sequels for the next thousand Kanji.
A must-read if you're learning the language.