Well I've found two James W. Heisig books I'm thinking of getting, but I've found two different covers with different titles:
Kanji Book 1
Kanji Book 2
And then there are the kana books:
Kana Book 1
Kana Book 2
And my question is, are the two kanji books the same as each other? And are kana book 1 and 2 also the same?