Joram Lindenstrauss & Lior Tzafriri 
Classical Banach Spaces I and II [PDF ebook] 
Sequence Spaces and Function Spaces

Springer-Verlag began publishing books in higher mathematics in 1920, when the series Grundlehren der mathematischen Wissenschaften, initially conceived as a series of advanced textbooks, was founded by Richard Courant. A few years later a new series Ergebnisse der Mathematik und ihrer Grenzgebiete, survey reports of recent mathematical research, was added.Of over 400 books published in these series, many have become recognized classics and remain standard references for their subject. Springer is reissuing a selected few of these highly successful books in a new, inexpensive sofcover edition to make them easily accessible to younger generations of students and researchers.Classical Banach Spaces I and IIFrom the reviews: …the book is written in the best tradition of the beautiful series in which it appears. The material it presents is hard to find in other books. For people working in the structure theory of Banach spaces it will be most valuable as a source of references and inspiration. For those who wish to learn the subject the book deserves a warm welcome too. Medelingen van het Wiskundig Genootschap The geometry of Banach lattices is a rich, beautiful, and rewarding subject. The proof is in the reading and perusing of the masterpiece. Zentrablatt fur Mathematik