EASY AND FUN KANJI: A Basic Guide to Learning Kanji
I wrote this book as part of the Easy and Fun series after the hiragana and katakana books from that set. I imagine that most people who are reading this book as part of their Japanese studies also feel that the kanji writing system is by far the hardest part of learning the Japanese language.
There are several reasons: the number of unique kanji is huge; they have complicated shapes; there are many ways to pronounce them; writing them is tricky.
Japanese natives learn the characters slowly over a period of many years