This book and blog by Jennifer Viemont has been a crucial part of my research. She covers everything from Pros and Cons to listing the top 13 European schools offering English taught degrees. The book goes into great detail about the schools and student life in Europe.
The parent version of the Flown Abroad, Full Time Facebook group has about 11,000 members who all have kids who are or are planning to go to University abroad who are there to share stories and offer advice.