Ubuntu Unleashed 2019 EditionMatthew Helmke · First published 2018 · Latest edition 2021Open the Tome
Practical Guide to Linux Commands, Editors, and Shell ProgrammingMark Sobell, Matthew Helmke · First published 2012Open the Tome
Ubuntu Unleashed 2017 Edition (Includes Content Update Program): Covering 16.10, 17.04, 17.10 (12th Edition)Matthew Helmke · First published 2016Open the Tome
Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04 (9th Edition)Matthew Helmke · First published 2013Open the Tome
The Official Ubuntu BookMatthew Helmke, Elizabeth K. Joseph, José Antonio Rey, Philip Ballew, Benjamin Mako Hill, Jose Antonio Rey · First published 2009Open the Tome
