As many readers know, we have been adding to our staff here at AllThingsD, most recently in our new reviews section, with the addition of Lauren Goode earlier this year.

Now Walt Mossberg and I are proud to announce that Mike Isaac is joining our team to cover the social Web and its biggest players, including Facebook, Twitter and Google+.

He comes to ATD most recently from a staff writer position at Wired, where, among many other things, he spent much of his time writing about Google’s mobile and social efforts.

From 2010 to 2012, his coverage at Wired included the decline and fall of Hewlett-Packard’s mobile empire, Google’s surprise acquisition of Motorola Mobility, and Facebook’s steady trudge toward IPO-hood.

Prior to that, he wrote about the business of tech for Forbes magazine and Forbes.com, with a particular emphasis on start-ups and social. His work has also appeared in Paste magazine, Performer magazine, DNR magazine and the Washington Examiner.

Isaac holds a degree in English literature from the University of California at Berkeley, and is a former Georgetown University journalism fellow.

He takes over the social beat from Liz Gannes, who will be stepping up our coverage of the many businesses of Google, innovation, venture investing and the start-up scene — especially its bigger companies, from Pinterest to Quora to Dropbox. Gannes, as everyone who follows her knows well, has become a key observer of Silicon Valley and its players, and her insights into the tech scene have become one of our most invaluable offerings.

We’re excited for both of them, and look forward to their stellar work on our site.