National Council of Educational Research and Training (NCERT), the autonomous organization to design school academic program and curriculum in India, has something really nice to offer on its website: PDF version of all the textbooks published by it! NCERT textbooks are followed by Central Board of Secondary Education (CBSE) and various other educational boards in India.
Anyone can read these textbooks available online on NCERT’s website, and download them in PDF format to read offline. This is really a boon for the students, specially those who face a usual delay ( :( ) in getting printed version of NCERT textbooks.
To read or download NCERT textbook, visit this link: http://www.ncert.nic.in/textbooks/testing/Index.htm
Users need a desktop based PDF reader (like Adobe Reader, Sumatra) or browser plug-in like gPDF to open PDF files.
Well done NCERT! :)