Some books listed here may be out of print, but if you are lucky you may find one or the other at a flea market or in a second-hand bookshop, even in a public library ...
If there are books (in whatever language) related to Z80, you know of or you would like to recommend, please tell me.
Zilog
Zilog Data Book Feb 1980 03-8032-01
Zilog 1981 03-2034-01
Mostek 1981 MK79602
SGS Technical Manual 1981 DAZ80TMCPU/2
SGS DAZ80MSYS/3
Toshiba Corporation
Zilog Discrete Devices and Embedded Controllers Product Specification Databook Q2/94 DC 8321-00
Zilog Microprocessor Solutions For Datacommunications and Computer Peripheral Applications User's Manual Q1/95 DC 8309-01
Zilog Microprocessors and Peripherals Databook Q4/94 DC 8322-01
Zilog Product Specification Q2/95 PS953800104
Toshiba DATA BOOK
Toshiba USER`s MANUAL 1992 92-7 4435-B
Toshiba DATA BOOK 92-10 4452-B
Hitachi DATA BOOK M21T132
Coffron, James W. Prentice-Hall, 1984. - XV, p330 : Ill. formerly: Practical hardware details for 8080, 8085, Z80 and 6800 microprocessor systems (Prentice-Hall series in microprocessor technology) ISBN 0-13-354663-2 .
Coffron, James W. & Long, William E. Prentice-Hall, 1983. - XIV, p401 : Ill. (Prentice-Hall series in microprocessor technology) ; Bibliography: p395. - Includes index ISBN 0-13-691394-6
Coffron, James W. Prentice-Hall, 1988. - XVIII, p510 : Ill. Includes index ISBN 0-13-581976-8 .
by Ramesh Gaonkar Published by Penram ISBN: 81-87972-15-7 This book is still in print, unlike most of the others
Ciarcia, Steve ISBN 0-07-010962-1, Byte Books
Osborne, Adam
by E.A. Parr Published by Bernard Babani (publishing) Ltd. ISBN: 0-85934-087-2.
by Phillip R. Robinson Published by Tab Books
Wadsworth, N.
by Hugo T. Jackson and A.M. Fischer Published by Harper and Row. The title itself should draw TI-BASIC programmers. Not about the Z80, but about a fictional chip called "GRAPE-80" which handles generalized instructions.
by Lance A. Leventhal published by OSBORNE/McGraw-Hill ISBN: 0931988-21-7
Leventhal, Lance A. & Saville, Winthrop Osborne/McGraw-Hill, 1983. - XI, 497 p. ISBN 0-07-931091-5 Some nice routines
by Christopher Lampton. Published by Franklin Watts. It refers to the old TRS-80 and other CP/M computers, but it can be generalized and applied to the TI fairly easily. The book offers a clear explanation of exactly what factors you control in ASM programming
by Alan R. Miller.
by William Tang. It's a great book and has a lot of non specific Z80 stuff. Just ignore the Spectrum only bits as sound and the game.
by Rodney Zaks SYBEX. ISBN: 0-89588-094-6 Good choice for beginners. Read this to understand the basics of Z80 assembler.
by James E. Hendrix. Based on the Small C compiler by Ron Cain described in Dr. Dobb's Journal in May 1980.
Editors: David H. Ahl and Carl T. Helmers Creative Computing Press, N.J. 1977 ISBN: 0-91-6688-04-6
Microprocessor Programming, Troubleshooting, and Interfacing: The Z80, 8080 and 8085