2015.06.18~2015.07.02
參考連結
http://blog.humblebundle.com/post/122351144342/score-some-extra-credit-with-new-titles-added-to
http://blog.humblebundle.com/post/121769466709/put-on-your-thinking-cap-with-the-humble-schools
http://us7.campaign-archive1.com/?u=a42731fd3353ff4c76f7f11bb&id=861d5afc3a
http://us7.campaign-archive2.com/?u=a42731fd3353ff4c76f7f11bb&id=04ed4d78f0