The remainder of the Chinese readings are introduced in separate chapters, designed to help the student learn the readings from everyday words and useful compounds. Volume 1 The first book in the series, commonly known as RTK1, was originally published in 1977. The sixth edition of the book was released in 2011. In the book, Heisig presents a method for learning how to associate the meaning and writing of 2,200 kanji, including most of the jōyō kanji. There is no attention given to the readings of the kanji as Heisig believes that one should learn the writing and meaning first before moving on to the readings in Volume II. Sixth Edition A sixth edition was released in April 2011. The sixth edition includes corrections for all errata from prior editions, as well as additional kanji from the 2010 significant revision to the Jōyō kanji. The additional kanji in the sixth edition have also been made into a supplement for older editions. Likewise, RTK2 and RTK3 have been updated in 2012 to reflect these changes. Volume 2 The second book in the series, often referred to as RTK2, is the second in the Remembering the Kanji. Volume II presents the official readings of the kanji introduced in Volume I. Differences from Volume I Unlike the first volume, this book does not rely on "imaginative memory". The book is mainly focused on the Chinese readings, however one chapter does suggest a mnemonic device for learning the Japanese readings. Heisig splits the kanji into various chapters, according to the most appropriate method to learn their readings. For each Chinese reading of a kanji, an example compound word is given. Volume 3 The third book, commonly referred to as RTK3, is the third in the Remembering the Kanji book series by James Heisig. This volume was co-authored by Tanya Sienko. Volume 3 presents a further 800 kanji in addition to the 2,200 kanji introduced in Volume 1 and Volume 2. It is split into two parts. The first part is in the style of Volume I, where the writing and keywords are learned. The majority of the new kanji are introduced according to their traditional radical. The other part is in a similar style to Volume 2, where the readings of the kanji are learned. Remembering the Kana Remembering the Kana: A Guide to Reading and Writing the Japanese Syllabaries in 3 hours each