## Online books or manuscripts

A general URL for online books can be found on the
AMS Web site, see
here

Link to the book by Jiří Adámek, Horst Herrlich, and George E. Strecker, Abstract and Concrete Categories. The Joy of Cats

Link to Michael Barr and Charles Wells's book
Toposes, Triples and Theories

Link to Sterling Berberian's book
Baer Rings and Baer *-Rings

Link to George M. Bergman's book
An Invitation to General Algebra and Universal Constructions, Henry Helson, Berkeley, CA, 1998. ii+398 p. ISBN: 0-9655211-4-1

Link to Stanley N. Burris and H.P. Sankappanavar's book
A Course in Universal Algebra, formerly published in Graduate Texts in Mathematics **78**. Springer-Verlag, New York-Berlin, 1981. xvi+276 p. ISBN: 0-387-90578-2

Link to Ralph Freese and Ralph McKenzie's book
Commutator Theory for Congruence Modular Varieties, formerly published in
London Mathematical Society Lecture Note Series **125**. Cambridge University Press, Cambridge, 1987. iv+227 pp. ISBN: 0-521-34832-3

Link to Ken Goodearl and Fred Wehrung's book
The Complete Dimension Theory of Partially Ordered Systems
with Equivalence and Orthogonality, Mem. Amer. Math. Soc. **176** (2005), no. 831, vii+117 p.

Link to David Hobby and Ralph McKenzie's book
The Structure of Finite Algebras Contemporary Mathematics **76**. American Mathematical Society, Providence, RI, 1988. xii+203 p. ISBN: 0-8218-5073-3

Link to George Hutchinson's book
Lattices and Categories of Modules

This book, together with Hutchinson's
expository paper ``Lattice theory equations and interesting lattices", can also
be found at the following link

Link to Peter Jipsen and Henry Rose's book
Varieties of Lattices, formerly published in Lecture Notes in Mathematics **1533**. Springer-Verlag, Berlin, 1992. x+162 p. ISBN: 3-540-56314-8

At the beginning of Jaroslav Ježek's Web page, you can find several downloadable manuscripts: Universal Algebra, Geometries, bibliography database of universal algebra.

Link to Emil Kiss and Keith Kearnes's book
The Shape of Congruence Lattices

Link to J.B. Nation's book
Notes on Lattice Theory

Link to Donald S. Passman's book
Group Rings, Crossed Products and Galois Theory

Lecture Notes of my graduate course about ordered algebraic
structures (in French, and pdf format; 1.2 MB):
Structures algébriques ordonnées