LibreTexts – Free The Textbook
Love the mission and effort ...
yet the first book I tried to look at in pdf format gave me a 404<p><a href="https://batch.libretexts.org/print/Finished/eng-46560/Full.pdf" rel="nofollow">https://batch.libretexts.org/print/Finished/eng-46560/Full.p...</a><p>From the link below, full pdf:
<a href="https://eng.libretexts.org/Bookshelves/Computer_Science/Applied_Programming/Book%3A_Think_Complexity%3A_Exploring_Complexity_Science_with_Python_(Downey)/01%3A_Complexity_Science" rel="nofollow">https://eng.libretexts.org/Bookshelves/Computer_Science/Appl...</a>