From the reviews: "The approach of this book is based on the foundations of geometry and on group theory ... . The book is self-contained ... . This well written book can serve as a reference and a source of constructions for researchers of the theory of non-associative structures. Also, thanks to the didactic presentation, I can also recommend it for motivated graduate students and university teachers." (Gabor P. Nagy, Acta Scientiarum Mathematicarum, Vol. 71, 2005) "This book, which is based on the author's habilitation thesis, is about a class of loops which have been intensively studied in the last decade and a half or so. ... This book is a guide and reference to K-loops, especially to the work of Karzel's students and followers. It is also a good source for the relationship between K-loops and other varieties of loops. ... The book is quite readable and is certainly something that everyone working on these loops will find quite useful." (Michael K. Kinyon, Mathematical Reviews, Issue 2003 d)

• Introduction.- Preliminaries.- Left Loops and Transversals.- The Left Inverse Property and Kikkawa Loops.- Isotopy Theory.- Nuclei and the Autotopism Group.- Bol Loops and K-Loops.- Frobenius Ggroups with Mmany Involutions.- Loops with Fibrations.- K-Loops from Classical Groups over Ordered Fields.- Relativistic Velocity Addition.- K-Loops from the General Linear Groups over Rings.- Derivations.

From the reviews: "The approach of this book is based on the foundations of geometry and on group theory ... . The book is self-contained ... . This well written book can serve as a reference and a source of constructions for researchers of the theory of non-associative structures. Also, thanks to the didactic presentation, I can also recommend it for motivated graduate students and university teachers." (Gabor P. Nagy, Acta Scientiarum Mathematicarum, Vol. 71, 2005) "This book, which is based on the author's habilitation thesis, is about a class of loops which have been intensively studied in the last decade and a half or so. ... This book is a guide and reference to K-loops, especially to the work of Karzel's students and followers. It is also a good source for the relationship between K-loops and other varieties of loops. ... The book is quite readable and is certainly something that everyone working on these loops will find quite useful." (Michael K. Kinyon, Mathematical Reviews, Issue 2003 d)

• Introduction.- Preliminaries.- Left Loops and Transversals.- The Left Inverse Property and Kikkawa Loops.- Isotopy Theory.- Nuclei and the Autotopism Group.- Bol Loops and K-Loops.- Frobenius Ggroups with Mmany Involutions.- Loops with Fibrations.- K-Loops from Classical Groups over Ordered Fields.- Relativistic Velocity Addition.- K-Loops from the General Linear Groups over Rings.- Derivations.