"Ubiquitous learning environments and technologies is particularly good to open readers' eyes to the endless possibilities that u-learning has to offer to individuals and groups. ... The chapters are well written and mostly reader friendly. ... The explanations and ideas of u-learning are well supported by good general and specific evidence and plenty of references. ... In conclusion, this is a must-read volume which will benefit teachers and researchers alike." (Jesus Garcia Laborda, British Journal of Educational Technology, Vol. 46 (6), 2015)