Professor Dennis Lindley was a key figure in the development of the Bayesian statistics movement. This book of thoughts and reminiscences was prepared as a gift to Dennis for his 90th birthday in July, 2013. Sadly, he died in December, 2013. The book is now offered as a tribute to Dennis Lindley, and to show some insight into a man whose intellect inspired many and whose warmth and generosity touched all who knew him.