Title: The Alchemy of Happiness
Author: Claud Field (translation of selected portions of the Ihya, 1910)
Availability: Public domain. Freely available on Archive.org, Google Books, and Sacred-Texts.com as a PDF.
Limitation: Only covers a fraction of the full 40-book Ihya.
Title: Iḥyā’ ‘Ulūm al-Dīn (إحياء علوم الدين)
Author: Imam Abu Hamid Muhammad al-Ghazali (1058–1111 CE)
Language of PDF: English (various translations/editions)
Genre: Islamic theology, spirituality, jurisprudence, self-purification imam ghazali ihya ulumuddin english pdf
Because Imam Ghazali died in 1111, the original Arabic text is public domain. However, translations have their own copyrights. Title: The Alchemy of Happiness Author: Claud Field
The complete, scholarly English translation by Mohammad Mahdi al-Sharif (Dar al-Kotob al-Ilmiyah) is available in print. No legal free PDF exists, but you can find previews on Google Books or Amazon ("Look Inside"). No legal free PDF exists, but you can
These sites often host the Fazlul Karim translation as PDFs. Proceed at your own caution regarding copyright: