Principles of Transformer Design by Alfred Still

A Book which deals exclusively with the theory and design of alternating current transformers is not likely to meet the requirements of a College text to the same extent as if its scope were broadened to include other types of electrical machinery. On the other hand, the fact that there may be a limited demand for it by college students taking advanced courses in electrical engineering has led the writer to follow the method of presentation which he has found successful in teaching electrical design to senior students in the school of Electrical Engineering at Purdue University. Stress is laid on the fundamental principles of electrical engineering, and an attempt is made to explain the reasons underlying all statements and formulas, even when this involves the introduction of additional material which might be omitted if the needs of the practical designer were alone to be considered.
LINK1
http://www.forgottenbooks.org/books/Principles_of_Transformer_Design_1000221063
LINK2-FULL TEXT
https://archive.org/download/principlesoftran00stilrich/principlesoftran00stilrich.pdf