The best books on architectural theory dissolve hardening of the categories, a commonplace disorder. Guallart s is one of the finest because of how effortlessly he pries apart old credos regarding supposed irreconcilable differences between Nature and high-tech. Best of all, he creates an original and practical vocabulary for thinking through designs to reconcile these seeming contraries. An example is the word rurban referring to designed places of transition between city and country, making discussing architecture of flowing energies a tad more inviting.