preface update

preface.asciidoc

@@ -117,6 +117,25 @@ Follow us on Twitter: link:$$http://twitter.com/oreillymedia$$[]
 
 Watch us on YouTube: link:$$http://www.youtube.com/oreillymedia$$[]
 
+=== Contacting the Author
+
+You can contact me, Andreas M. Antonopoulos, on my personal site:
+link:$$https://antonopoulos.com/$$[]
+
+Information about "Mastering Bitcoin" as well as the Open Edition and translations are available on:
+link:$$https://bitcoinbook.info/$$[]
+
+Follow me on Facebook:
+link:$$https://facebook.com/AndreasMAntonopoulos$$[]
+
+Follow me on Twitter:
+link:$$https://twitter.com/aantonop$$[]
+
+Follow me on Linkedin:
+link:$$https://linkedin.com/company/aantonop$$[]
+
+Many thanks to all my patrons who support my work through monthly donations. You can follow my Patreon page here:
+link:$$https://patreon.com/aantonop$$[]
 
 === Acknowledgments
 
@@ -126,7 +145,7 @@ It is impossible to make a distinction between the bitcoin technology and the bi
 
 The journey to becoming an author starts long before the first book, of course. My first language (and schooling) was Greek, so I had to take a remedial English writing course in my first year of university. I owe thanks to Diana Kordas, my English writing teacher, who helped me build confidence and skills that year. Later, as a professional, I developed my technical writing skills on the topic of data centers, writing for _Network World_ magazine. I owe thanks to John Dix and John Gallant, who gave me my first writing job as a columnist at _Network World_ and to my editor Michael Cooney and my colleague Johna Till Johnson who edited my columns and made them fit for publication. Writing 500 words a week for four years gave me enough experience to eventually consider becoming an author.
 
-Thanks also to those who supported me when I submitted my book proposal to O'Reilly by providing references and reviewing the proposal. Specifically, thanks to John Gallant, Gregory Ness, Richard Stiennon, Joel Snyder, Adam B. Levine, Sandra Gittlen, John Dix, Johna Till Johnson, Roger Ver, and Jon Matonis. Special thanks to Richard Kagan and Tymon Mattoszko, who reviewed early versions of the proposal and Matthew Owain Taylor, who copyedited the proposal.
+Thanks also to those who supported me when I submitted my book proposal to O'Reilly, by providing references and reviewing the proposal. Specifically, thanks to John Gallant, Gregory Ness, Richard Stiennon, Joel Snyder, Adam B. Levine, Sandra Gittlen, John Dix, Johna Till Johnson, Roger Ver, and Jon Matonis. Special thanks to Richard Kagan and Tymon Mattoszko, who reviewed early versions of the proposal and Matthew Taylor, who copyedited the proposal.
 
 Thanks to Cricket Liu, author of the O'Reilly title _DNS and BIND_, who introduced me to O'Reilly. Thanks also to Michael Loukides and Allyson MacDonald at O'Reilly, who worked for months to help make this book happen. Allyson was especially patient when deadlines were missed and deliverables delayed as life intervened in our planned schedule. For the second edition, I thank Timothy McGovern for guiding the process, Kim Cofer for patiently editing, and Rebecca Panzer for illustrating many new diagrams.
 
@@ -176,7 +195,7 @@ Following is a list of notable GitHub contributors, including their GitHub ID in
 * Esteban Ordano (eordano)
 * ethers
 * fabienhinault
-* francyi
+* Frank Höger (francyi)
 * Gaurav Rana (bitcoinsSG)
 * genjix
 * halseth