The Johnny Maxwell Trilogy by Terry Pratchett

A witty, warm coming-of-age series following Johnny, a Dublin-area kid whose ordinary life is disrupted by extraordinary events: a video game alien who surrenders to him, a neighborhood graveyard that speaks, and a mysterious time-travel incident that forces him to confront history and mortality. Through surreal adventures with his friends, the books blend humor, social commentary, and empathy as Johnny wrestles with responsibility, loss, and the awkward business of growing up.