Mustoes will now begin work on a consumer ad campaign to appear across print, outdoor and radio. It will be supported by a national PR campaign fronted by the Almanac's founder, Ben Schott.
Work is scheduled to break later this year, to coincide with the publication of the Almanac in the run-up to Christmas.
Schott's Almanac is an annual publication that reviews the past year as well as previewing the year ahead. The 2007 edition comprised 13 sections that included Media and Celebrity, Parliament and Politics and The World.
Nick Mustoe, the co-founder of Mustoes, said: "It has been a strong start to an exciting year, and working with Schott's Almanac will prove to be creative, entertaining and informative."
The win follows Mustoes' relaunch as an independent in March, when Nick Mustoe bought the agency back from the Japanese advertising giant Hakuhodo.