Adam Grzymała-Siedlecki was born into an impoverished noble family on 29 January 1876 in Wierzbno, near Kraków, then part of the Russian Empire.

He then started to study at the Wawelberg and Rotwand's School of Engineering in 1894, but had to drop off in 1896, after being jailed at the dreaded Tenth Pavilion of the Warsaw Citadel for participating in illegal Polish self-education clubs.

He occasionally performed on the stage (e.g. a parody of Stanisław Tarnowski) and even wrote memoirs about the beginnings of this institution, "Ludzie Zielonego Balonika", (People of the Zielony Balonik) in the magazin Teatr (issue N. 9, 1951).

After the end of WWI and following a disagreement Kraków City Council, he resigned as Director of the theatre and moved to Warsaw.

With the re-creation of the Polish state, AGS joined the political life as a supporter of National Democracy party.

Furthermore, he became from 1918 to 1921 the co-editor of the Tygodnik Illustrowany: as such, he made a trip in June 1919, to Paris to report about the negotiations around the elaboration of the future Treaty of Versailles.

When asked about the rationale for choosing this city, Adam Grzymała-Siedlecki used to claim that he was[3] attracted to the land where his ancestors originated from, (that he) [...] recognized the political and strategic importance of the region [...], and finally that (he) saw there favorable conditions for quietness, necessary for literary works.In Bydgoszcz, he devoted his time to writing.

His most popular pieces from this period are:[2] He also wrote articles and columns for newspapers in Warsaw, Poznań (Kurier Poznański) and Bydgoszcz (Dziennik Bydgoski, Hallerczyk, Gazeta Bydgoska).

Grzymała-Siedlecki actively participated in the intellectual and cultural life of Bydgoszcz, giving lectures, readings and organizing artistic events.

At the beginning of the 1930s, Adam surprised the intellectual community by giving to the library a dozen of books from Vladimir Lenin's Poronin collection, from the period when the soviet leader-to-be used to stay in the Polish Tatra (1913–1914).

Released in February 1943, he moved to hiding in Bielany, near Grójec, where the conditions of his imprisonment weakened him for a long time.

[7] He was still working as a columnist and literary critic with journals Ilustrowany Kurier Polski and Tygodnik Warszawski(1945–1946) initially.

Later on, he cooperated with a multitude of others: Arkona, Łodz Teatralna, Odnowy, Ziemia Pomorska, Żołnierz Polski, Życie Literackie, Twórczość, Tygodnik Powszechny, Teatr, Pamiętnik Teatralny or Pomerania.

[8] At times, Adam Grzymała-Siedlecki used pseudonyms to sign his books: AGS, Quis, Mus, Franciszek Wierzbiński, Jan z Marnowa.

[12] In addition to the aforementioned, Grzymała-Siedlecki published literary studies and critical articles in the following papers or magazines: Młodość, Życie, Krytyka, Sfinks, Museion, Tygodnik Ilustrowany, Słowo Polski, Czasie, Dziennik Poznański, Rzeczpospolita, Kurier Warszawski.

In complement of the above-mentioned works, Grzymała-Siedlecki also wrote: In 1984, a television movie was shot, inspired by Adam's war memoirs, 111 dni letargu.