Update Playbook links

0-Pre-Sprint/Materials/Pre-Sprint_Request_for_Materials.md

@@ -14,8 +14,12 @@ To prepare for it, it would be great to have:
 
 (5) For <date>, we'll want to schedule time with users in the morning and early afternoon. 6 users for 30 minutes each would be ideal. If you identify the people you want to bring in, we'd be happy to schedule them, or you could schedule the times directly if that's easier. We'll want to finish by 2:30pm to prepare findings for a 3:30pm discussion that day that will end the Design Sprint. We'll have each participant use the prototype we built and ask them questions to get their feedback.
 
-Please also review the [Product Design Sprint](http://playbook.thoughtbot.com/#product-design-sprint) section of our Playbook, as well as [Google Ventures' post about the process](http://www.gv.com/lib/the-product-design-sprint-a-five-day-recipe-for-startups).
+Please also review the [Product Design Sprint] section of our Playbook, as well as [Google Ventures' resources about the process][GV].
 
 See you soon. Thanks,
 
 --____________
+
+
+[Product Design Sprint]: https://thoughtbot.com/playbook/product-design-sprint/introduction
+[GV]: http://www.gv.com/sprint/

README.md

@@ -125,12 +125,12 @@ and have confidence in our next steps.
 
 ## [Design Sprint Trello Template](https://trello.com/b/lMmuSlkP/public-design-sprint-template)
 
-Throughout the sprint you want to be recording as much as possible. 
+Throughout the sprint you want to be recording as much as possible.
 We've found Trello to be an excellent tool to help the team record the activities
 taken during the sprint. This template helps alleviate some of the initial setup
 for the board and leaves references to this repo.
 
-Copy [this template](https://trello.com/b/lMmuSlkP/public-design-sprint-template) 
+Copy [this template](https://trello.com/b/lMmuSlkP/public-design-sprint-template)
 to your own board to help guide and document your sprint.
 
 
@@ -145,7 +145,7 @@ to your own board to help guide and document your sprint.
 ## Further Reading
 
 * [thoughtbot's blog post](http://robots.thoughtbot.com/the-product-design-sprint)
-* [thoughtbot playbook](http://playbook.thoughtbot.com/#product-design-sprint)
+* [thoughtbot playbook](https://thoughtbot.com/playbook/product-design-sprint/introduction)
 * Google Ventures [Design Staff blog posts](http://www.designstaff.org/articles/product-design-sprint-2012-10-02.html)
   * [Before the sprint: Prepare](http://www.designstaff.org/articles/product-design-sprint-2-2012-10-09.html)
   * [Day 1: Understand](http://www.designstaff.org/articles/product-design-sprint-day-1-understand-2012-10-16.html)