It illustrates the timeline of the world's events from the prehistoric eras to the present, spanning the Big Bang theory, Medieval Europe, civilizations, and the 2010s.

She further wrote, "Filled with hidden details and subtle wit, Goes's sweeping graphic history is peopled with endearing Gumby-like worker beings and more richly textured, realistically rendered individual game changers.

[6] Reviewing for Reading Time, Stella Lees praised the book, calling it "unusual, full of facts, and pictorially appealing" so therefore "likely to open new vistas for middle school readers".

[2] A five-starred review in San Francisco Book Review of Timeline described it as "an amazing pictorial assemblage of historical happenings from civilization's beginning up to the present time" and wrote that the "stunning colorful format with the intriguing figures [...] will capture the interest of young readers and enrapture mature viewers as they reminisce through these historical images.

"[8] Kirkus Reviews called the book "highly selective with both the hordes of stylized but recognizable artifacts and historical figures and the buckets of specific facts and dates scattered throughout".