This audiobook is narrated by an AI Voice.This is an audio adaptation of the ⁠OpenStax Additive Manufacturing Essentials textbook⁠. The audiobook is produced by ⁠Audileo⁠.What OpenStax says about their textbook: Additive Manufacturing Essentials is an introduction to the core principles, technologies, and methods in the field of additive manufacturing. Rooted in industry practice and innovation, the material presents examples and approaches from an array of companies, equipm...

A comprehensive illustrated field guide to the birds of Greater Southern AfricaThe vast region of Greater Southern Africa—which includes Botswana, Eswatini, Lesotho, Malawi, Mozambique, Namibia, South Africa, Zambia, and Zimbabwe—is home to a truly extraordinary diversity of birds. This spectacular field guide covers all of the region’s bird species—resident, breeding, migrant, and vagrant.Covers all 1,198 species recorded in the region, including det...

The Ultimate Submarine Compendium: 36 Captivating Reads charts the submarine's emergence as both technological marvel and literary emblem of modernity. Ranging from technical exposition, naval history, and eyewitness-inflected discussion to adventure fiction, juvenile serials, and speculative romance, the volume reveals how undersea navigation inspired dreams of scientific mastery alongside anxieties about war, secrecy, and the unknown. Particularly striking are its encounters between prac...

View our feature on John Barnes’s Directive 51.The first book in a new post-apocalyptic trilogy from "a master of the genre"Heather O'Grainne is the Assistant Secretary in the Office of Future Threat Assessment, investigating rumors surrounding something called "Daybreak." The group is diverse and radical, and its members have only one thing in common-their hatred for the "Big System" and their desire to take it down.Now, s...

Blending alternate history, time travel, and detective thriller, the "able and impressive" Nebula and Hugo Award nominee gives us Nazis, Tories, and togas ( The Washington Post).An attack by time-hopping terrorists turns Mark Strang's life upside down, and the Pittsburgh art historian discovers his calling as a bodyguard for hire. Strap yourself in for a ride through alternate timelines in this action-packed series that combines sci-fi, time travel, alien ...

A "wildly entertaining homage to the best '60s Heinlein juveniles," from a multiple Nebula finalist ( Publishers Weekly).Jak Jinnaka's teenage life in the thirty-sixth century has been nothing but fun—ignoring school, partying outrageously with his beautiful girlfriend, Sesh, and spending his uncle Sib's huge fortune. But then, while they are out for a wild night of post-graduation clubbing, Sesh is kidnapped by the dangerous, enigmatic Duke of Uranium.

Jak Jinnaka is off to save a princess yet again—except . . .Ostensibly a diplomat, really a spy in training, Jak Jinnaka has such a gift for getting into trouble that his fellow students have voted him "most likely to have a war named after him." His latest offense against cultural sensitivity would have ended his career at his junior year—except that the Academy is thoroughly corrupt, Jak has powerful and wealthy friends, and there's an easier way for the dean of s...

In an alternate Roman Empire, the ultimate battle is being waged for domination of the multiverse in the epic conclusion of the war for a million EarthsThere are a million different Earths across an infinite number of timelines—and every one of them is in peril.John Barnes's ingenious science fiction saga the Timeline Wars reaches a breathtaking climax in Caesar's Bicycle as former Pittsburgh private investigator–turned–Crux Op agent Mark St...

First in the series blending alternate history, time travel, and detective thriller, from a Nebula and Hugo Award nominee.There are a million different Earths across an infinite number of timelines—and every one of them is in peril.Mark Strang became a bodyguard and private investigator when terrorists killed his family; now he spends his days protecting Pittsburgh's helpless and abused. But while on a mission to save the life of a ten-year-old girl,...

Ada is the language of choice for the majority of programmers involved in writing safety-critical and high-integrity software. Previous editions of John Barnes' books established themselves as the definitive references for earlier versions of Ada. With the release of the latest ISO standard, Ada 2012, this new book will become recognised as the go-to resource for those wishing to learn the language or to program in it.

With the soul of thirty-sixth-century humanity at stake, Jak Jinnaka steps in . . . now we're really in troubleJak Jinnaka parlayed his powerful family connections, unearned media fame, and consistent dumb luck into a cushy job as vice procurator of the Martian moon Deimos, an office he precariously maintains alongside his top-secret post as a station chief for Hive Intelligence—two soft jobs for an already rich, handsome, single young man in a fun-loving c...

An eloquent and thought-provoking book on racism and prejudice by the Liverpool and England football legend John Barnes.John Barnes spent the first dozen years of his life in Jamaica before moving to the UK with his family in 1975. Six years later he was a professional footballer, distinguishing himself for Watford, Liverpool and England, and in the process becoming this country's most prominent black player.Barnes is now an articulate and captivating socia...