"Primer on the Metabolic Bone Diseases and Disorders of Mineral Metabolism" by Ed Murray J Favus is the second edition of a multi-author publication by the American Society for Bone and Mineral Research. The book is divided into short chapters by over 80 authors and covers most disorders of bone and mineral metabolism. While there is some overlap and variation in style and referencing, the book provides a good balance and is a useful primer for students, physicians, and scientists. It is aimed mainly at American readers and may have some limitations in wider use due to differences in treatment approaches between the US and Europe. Despite this, it is recommended for those with an interest in bone disease. "Dubois' Lupus Erythematosus," 4th edition, edited by D J Wallace and B H Hahn, is a comprehensive textbook on lupus. It has been expanded with more contributors and chapters, and the style is readable with a comprehensive bibliography. However, it contains some Americanisms and may not be fully suitable for European readers. The management sections are strong, but some treatment recommendations, such as the dismissal of methotrexate, are considered premature. Despite these issues, the book is recommended for practicing rheumatologists to aid in understanding and managing lupus."Primer on the Metabolic Bone Diseases and Disorders of Mineral Metabolism" by Ed Murray J Favus is the second edition of a multi-author publication by the American Society for Bone and Mineral Research. The book is divided into short chapters by over 80 authors and covers most disorders of bone and mineral metabolism. While there is some overlap and variation in style and referencing, the book provides a good balance and is a useful primer for students, physicians, and scientists. It is aimed mainly at American readers and may have some limitations in wider use due to differences in treatment approaches between the US and Europe. Despite this, it is recommended for those with an interest in bone disease. "Dubois' Lupus Erythematosus," 4th edition, edited by D J Wallace and B H Hahn, is a comprehensive textbook on lupus. It has been expanded with more contributors and chapters, and the style is readable with a comprehensive bibliography. However, it contains some Americanisms and may not be fully suitable for European readers. The management sections are strong, but some treatment recommendations, such as the dismissal of methotrexate, are considered premature. Despite these issues, the book is recommended for practicing rheumatologists to aid in understanding and managing lupus.