Home › Authors › Dean Leffingwell 👤 Dean Leffingwell 9 books Books by Dean Leffingwell SAFe 5.0 Distilled 2021 ART of Avoiding a Train Wreck 2019 SAFe 4. 5 Distilled SAFe 4. 5 Distilled 2018 SAFe 4.5 Reference Guide 2018 SAFe 4. 0 Distilled SAFe 4. 0 Distilled 2017 SAFe reference guide 2017 SAFeĀ® 4. 0 Reference Guide SAFeĀ® 4. 0 Reference Guide 2016 Agile software requirements 2011 Scaling Software Agility 2007