"Silent Sorority: A Barren Woman Gets Busy, Angry, Lost and Found" by Pamela Tsigdinos. This book is Pamela's memoir on going through infertility and coming out on the other end without children. She is a well-known blogger in the infertility community. I enjoyed her book and found some of it to ring so true to my experiences.
"Sweet Grapes: How to Stop Being Infertile and Start Living Again" by Jean and Micheal Carter. This book felt more like a handbook to me. The authors were very practical in their approach and addressed childfree issues like identity, old age, and acceptance. They say you can stop being infertile when you stop trying to conceive. This book is out of print and I had to buy a used copy.
"Infertility: Help, Hope, and Healing" by Kerstin Daynes. This book is by an LDS author and uses the gospel, scriptures, and modern prophets to help those facing infertility.