Phaidon, a London-based publisher of sumptuous books on architecture and art, was recently sold and one can only hope that the new owner will preserve its integrity at a time when other publishers are dumbing down. Phaidon’s latest atlas of 20th Century World Architecture ($200) — a blockbuster in the same format as two previous surveys of contemporary work—chronicles 750 exemplary modern buildings of the 20th century. Classics are juxtaposed with unfamiliar projects, and the committees that produced this mammoth tome have striven for a geographical balance. Each project gets a full page of images, drawings and a succinct factual description, which facilitates comparisons. It’s a great work of reference, but you may prefer to wait a couple of years to buy the compact and inexpensive travel edition. Meanwhile, you can browse the entries, country by country, and plan future voyages of discovery. And, as further stimulus, the travel edition of The Phaidon Atlas of 21st Century World Architecture has just appeared.