Ishi Press
Ishi Press was the first major publisher of English-language go books. Many of their titles are now out of print, although Kiseido have since republished a number of them. Ishi Press itself has only published one new book since 1994.
The following is a (complete?) list of Ishi Press go books. Those with codes beginning with H (except perhaps H7) were only distributed by, not published by, Ishi Press. Note that the codes G20, G38 and G39 were never used.
G1 Modern Joseki and Fuseki, Volume 1 G2 Basic Techniques of Go * G3 Modern Joseki and Fuseki, Volume 2 G4 Go - International Handbook and Dictionary G5 The Middle Game of Go G6 Strategic Concepts of Go * G7 The 1971 Honinbo Tournament * G8 Go for Beginners G9 Go Para Principiantes G10 In the Beginning * G11 38 Basic Joseki * G12 Tesuji * G13 Life and Death * G14 Attack and Defense * G15 The Endgame * G16 Handicap Go * G17 Kage's Secret Chronicles of Handicap Go * G18 Test Your Go Strength G19 The Breakthrough to Shodan G20 unused G21 Dictionary of Basic Joseki, Volume 1 * G22 Dictionary of Basic Joseki, Volume 2 * G23 Dictionary of Basic Joseki, Volume 3 * G24 Enclosure Josekis G25 Appreciating Famous Games * G26 The Direction of Play * G27 Kato's Attack and Kill G28 Lessons in the Fundamentals of Go * G29 Reducing Territorial Frameworks * G30 An Introduction to Go? G31 The Second Book of Go * G32 The Power of the Starpoint G33 The Chinese Opening * G34 All about Thickness (softcover) G34H All about Thickness (hardcover) G35 The Great Joseki Debates G36 Opening Theory Made Easy * G37 Beyond Forcing Moves G38 unused G39 unused G40 The Go Player's Almanac * G41 The Magic of Go G42 All about Life and Death, Volume 1 G43 All about Life and Death, Volume 2 G44 The 3-3 Point: Modern Opening Strategy * G45 Positional Judgment * G46 Cho Hunhyun - Life and Master Games H1 Invincible: The Games of Shusaku (hardcover) * H2 The Treasure Chest Enigma H3 Graded Go Problems for Beginners, Volume 1 * H4 Graded Go Problems for Beginners, Volume 2 * H5 Graded Go Problems for Beginners, Volume 3 * H6 Graded Go Problems for Beginners, Volume 4 * H7 Mathematical Go Endgames
The books with an * have been reissued by Kiseido, with a K-prefix replacing the G-prefix for the G-prefix series. H1 is now K01, H3-H6 now K46-K49.
Bob McGuigan For what it's worth, Invincible--The Games of Shusaku was the first publication of the Kiseido Publishing Company and was published in 1982 when Ishi Press still existed and functioned.