These sites provides good reading material
(1) The Biodiversity Heritage Library improves research methodology by collaboratively making biodiversity literature openly available to the world as part of a global biodiversity community.
https://www.biodiversitylibrary.org/
(2) HathiTrust!
Founded in 2008, HathiTrust is a not-for-profit collaborative of academic and research libraries preserving 17+ million digitized items. HathiTrust offers reading access to the fullest extent allowable by U.S. copyright law, computational access to the entire corpus for scholarly research, and other emerging services based on the combined collection. HathiTrust members steward the collection
(3) This site is very useful as a source of pdf downloads of books. It is called Z-Library - part of the world's biggest e-library
https://b-ok.cc/?regionChanged
These are Charities supported by many SLLS members, Shall include more if sent to me, (MG)
This is a link to the Meththa Foundation, A Humanitarian Service for Sri Lankan People with Physical Disabilities.
Charities supported by Roshan Mahanama. He sent these at my request on behalf of SLLS members.
I give below the details of the Charities that I support, as requested by you:
Brand Ambassador - Hemas Outreach Foundation [a Pre-school project].
Brand Ambassador - SOS Children's Villages Sri Lanka [giving parental care to kids who have been abused or abandoned].
Trustee - "AYATI" Centre of Excellence for Disabled Kids.
Brand Ambassador - "ARRYA" Welfare Foundation for Armed Forces.
Brand Ambassador - "MITHURU MITHURO MOVEMENT" prevention of drug addiction and development of human moral & values towards a healthy lifestyle.
Brand Ambassador - The Stroke Association of Sri Lanka.
Goodwill Ambassador - The Kidney Patients Association.
Awaiting post