Maddie and Elle: 6 and 7 years // 13 and 14 years

For over 20 years, Massachusetts-based photographer Amanda Jones has been photographing dogs. And, for nearly 16 of those years, her faithful pup Lily was by her side in the studio, a frequent muse and the leading inspiration behind Jones’ most recent book release.

Dog Years: Faithful Friends Then & Now - Photography Book by Amanda Jones

Audrey: 3 and 12 years

Dog Years: Faithful Friends Then & Now - Photography Book by Amanda Jones

Violet: 2 and 9 years

Dog Years: Faithful Friends Then & Now celebrates this bond and the unconditional love dogs offer throughout their lives. The book features a heartwarming — and heartbreaking — collection of images of dogs in near identical poses at different ages, accompanied by stories of how they’ve impacted their owners’ lives.

Dog Years: Faithful Friends Then & Now - Photography Book by Amanda Jones

Rufus: 6 months and 13 years

Dog Years: Faithful Friends Then & Now - Photography Book by Amanda Jones

Petey: 1 year and 11 years

Dog Years: Faithful Friends Then & Now is available online.

Dog Years: Faithful Friends Then & Now - Photography Book by Amanda Jones

Maddy: 5 years and 10 years

Dog Years: Faithful Friends Then & Now - Photography Book by Amanda Jones

Bricoe: 1 year and 10 years

See more of Amanda’s work at www.amandajones.com.

[via BuzzFeed]