As demand for e-books soars, libraries struggle to stock their virtual shelves

Kindles, Nooks and iPads can do many amazing things, but they can’t bump you ahead in line at the Reston Regional Library. In fact, if you want to borrow a book, it may be quicker to put down your sleek new device and head into the stacks.

Checking out e-books without having to leave home — just as you would buy a title online: click and boom, there it is — might be the fastest-growing segment in the library business these days. But the experience is often far from the on-demand satisfaction people have come to expect from their laptops, tablets and smartphones. Frustration is building on all sides: among borrowers who can’t get what they want when they want it; among librarians trying to stock their virtual shelves and working with limited budgets and little cooperation from some publishers; and among publishers who are fearful of piracy and wading into a digital future that could further destabilize their industry. In many cases, the publishers are limiting the number of e-books made available to libraries.