books and magazins in .djvu format

[copilel]

hello..i'm a student at architecture university and I foud some books about architecture(100 best houses,new coastal house etc) in djvu format and I was very happy because those books have high prices and I foud them free to download.I want to know if there is somewone who knows where can I found more books and magasins free to download...thx all of you!