I Drive a Valence is a book of lyrics by Bill Callahan, the author and singer, whose songs (stories, really) are performed in his own inimitable and completely individual fashion. The book spans two decades of Smog/Bill Callahan songs. It is a fairly unforgettable look-see; in fact, it's a definitive-yet-concise trip through the mirror, collecting the lyrics to 70 songs and pairing them with 116 dreamy ink-wash images by the man himself.

An unnamed man studies the Vortex and his surroundings. He begins writing letters to a strange woman he is attracted to at a party. In this epistolary novelette set sometime in the future, he tells her of his daily life and a relationship between them unfolds. The letters form the seduction, in sifting the loose, disparate details of his day-to-day, the desires, the frustrations, the joys. The self as depicted through emotional weather updates, social observations, anecdotes, advice and well-timed punchlines.

A teenage girl treks across a dangerous, frozen nation to reunite with her family in this Philip K. Dick Award–winning apocalyptic thriller. Wylodine comes from a world of paranoia and poverty. Her family grows marijuana illegally in order to survive. But now she’s been left behind in Ohio to tend the crop alone. Then spring doesn’t return for the second year in a row, bringing unprecedented, extreme winter. With grow lights stashed in her truck and a pouch of precious seeds, Wil begins a journey to join her family in California. But the icy roads and strangers hidden in the hills are treacherous. Gathering a small group of exiles on her way, she becomes the target of a volatime cult leader. Because she has the most valuable skill in the climate chaos: she can make things grow. Road Out of Winter offers a glimpse into an all-too-possible near future, with a chosen family forged in the face of dystopian collapse. Alison Stine’s acclaimed debut “blends a rural thriller and speculative realism into what could be called dystopian noir” (Library Journal, starred review).

Valence Shell Electron Pair Repulsion (VSEPR) theory is a simple technique for predicting the geometry of atomic centers in small molecules and molecular ions. This authoritative reference was written by Istvan Hartiggai and the developer of VSEPR theory, Ronald J. Gillespie. In addition to its value as a text for courses in molecular geometry and chemistry, it constitutes a classic reference for professionals. Starting with coverage of the broader aspects of VSEPR, this volume narrows its focus to a succinct survey of the methods of structural determination. Additional topics include the applications of the VSEPR model and its theoretical basis. Helpful data on molecular geometries, bond lengths, and bond angles appear in tables and other graphics.

Girl in Landscape is a daring exploration of the violent nature of sexual awakening, a meditation on language and perception, and an homage to the great American tradition of the Western. • "Jonathan Lethem's imagination [is]...marvelously fertile." --Newsday The heroine is young Pella Marsh, whose mother dies just before her family flees a post-apocalyptic Brooklyn for the frontier of a recently discovered planet. Hating her ineffectual father, and troubled by a powerful attraction to a virile but dangerous loner who holds sway over the little colony, Pella sets out on a course of discovery that will have tragic and irrevocable consequences for the humans in the community and the ancient inhabitants, known only as archbuilders. Girl in Landscape finds Jonathan Lethem twisting forms and literary conventions to create a dazzling, completely unconventional tale.

In the excitement and rapid pace of developments, writing pedagogical texts has low priority for most researchers. However, in transforming my lecture l notes into this book, I found a personal benefit: the organization of what I understand in a (hopefully simple) logical sequence. Very little in this text is my original contribution. Most of the knowledge was collected from the research literature. Some was acquired by conversations with colleagues; a kind of physics oral tradition passed between disciples of a similar faith. For many years, diagramatic perturbation theory has been the major theoretical tool for treating interactions in metals, semiconductors, itiner ant magnets, and superconductors. It is in essence a weak coupling expan sion about free quasiparticles. Many experimental discoveries during the last decade, including heavy fermions, fractional quantum Hall effect, high temperature superconductivity, and quantum spin chains, are not readily accessible from the weak coupling point of view. Therefore, recent years have seen vigorous development of alternative, nonperturbative tools for handling strong electron-electron interactions. I concentrate on two basic paradigms of strongly interacting (or con strained) quantum systems: the Hubbard model and the Heisenberg model. These models are vehicles for fundamental concepts, such as effective Ha miltonians, variational ground states, spontaneous symmetry breaking, and quantum disorder. In addition, they are used as test grounds for various nonperturbative approximation schemes that have found applications in diverse areas of theoretical physics.