After being announced on November 19, 2007, the first issue was released on March 5, 2008. Echo ran for 30 issues, published on a roughly monthly basis, and concluding in June 2011, with periodic collections of five issues each. Following the series conclusion, a single collection of the entire series was published. In 2009, the film rights for Echo were purchased by producer Lloyd Levin. The movie was initially expected to begin production in late 2011. In 2017, Moore said Echo is set in the same fictional universe as his other works, Strangers in Paradise, Rachel Rising, and Motor Girl and that the characters may return in the 2018 book Strangers in Paradise XXV.
Story
While taking photographs in the desert, Julie Martin witnesses the explosion of a battle suit and its pilot, the end result of a live munitions exercise. The suit, now reduced to small pellets, rains down on Julie and her pick-up truck. The pellets are heavy, landing with significant force and adhere to both Julie and her truck. Julie returns home, still covered in pellets, and listens to a voice mail from her husband, who is insisting she sign divorce papers. Julie attempts to remove the pellets that have stuck to her, only to have the pellets spread and bond to a portion of her body. Julie decides to seek medical attention to have the metallic substance removed from her body. When she opens the door to her truck more of the pellets bond to her skin. Julie's shoulders and chest are almost completely covered by the metallic substance at this point, and the substance now bears an unknown symbol. When a doctor touches the substance it reacts by removing his fingernail, whereas Julie feels no more than a tingling and some slight warmth. The doctor believes the situation to be a horrible prank, and refuses to treat Julie. Meanwhile, the developers of the battle suit have confirmed Julie's presence at the scene of the explosion and dispatch a young woman known as Ivy to locate Julie. Julie is aided by Dillon Murphy, a park ranger who was the boyfriend of Annie, the previous owner of the suit. Ivy eventually teams with Julie and Dillon to help them escape and to stop Dr. Foster of HeNRI, who plans to use the alloy to power a black hole device. During her long run from the military, Julie discovers several things about her metallic plate. It seems bonded to her nervous system, tapping into her emotional state to achieve several powers, including, but not limited to, a powerful healing ability able to repair physical damage on her body and the ones of people to whom Julie is able to feel a strong empathic bond, or activate lightning to protect her from harm when she's scared or angered. Furthermore, the previous owner of the suit, Annie Trotter, seems to have somehow imprinted her personality in the metal, echoing at times in Julie's mind. The alloy also enhances Julie's physical form, making her noticeably taller and more powerful. Prolonged direct contact by Julie with Ivy also causes Ivy to decrease in physical age to her young teens.
Characters
; Julie Martin: Julie is a young photographer living near the desert where she witnesses the destruction of the Beta Suit. She is dealing with several hardships, ranging from delaying her divorce to being unable to feed her dog, Max. ; Ivy Raven: An NSB agent called in by Cooper to find Julie Martin. Ivy has a young daughter, Lulu. ; Dillon Murphy: Dillon is a California State Park ranger who served in the Army for six years, and Annie's boyfriend. He assists Julie in escaping from HeNRI and the military. ; Dr. Annie Trotter: A scientist at the Heitzer Nuclear Institute and a test pilot who died field testing the Phi Project suit. ; Cain: A homeless drifter who may be the biblical Cain. Cain is also exposed to the fallout, and his right hand is semi-coated with the alloy. He attacks Julie several times, in a quest to destroy himself. ; Professor Foster: In charge of Phi Project at HeNRI. ; Jack Cooper: Professor Foster's assistant at HeNRI, assigned to locate and stop Julie. ; Hong Liu: A researcher at HeNRI who builds a weapon to deactivate the Beta Suit. Liu's lower face is blown off in an explosion, and he later tries to deactivate the alloy on Julie.
Collected editions
Echo: Moon LakeVolume 1 - collects issues #1-5 of the series, plus bonus pages include development sketches and design notes, August 2008.