▁to ▁have ▁over ▁ 2 0 ▁million ▁records ▁in ▁its ▁database . ▁T ens ▁of ▁thousands ▁of ▁modern ▁books ▁have ▁been ▁made ▁available ▁from ▁ 1 5 0 ▁libraries ▁and ▁publish ers ▁for ▁e book ▁digital ▁l ending . ▁Other ▁books ▁including ▁in - print ▁and ▁in - copy right ▁books ▁have ▁been ▁sc anned ▁from ▁copies ▁in ▁library ▁collections , ▁library ▁disc ards , ▁and ▁don ations , ▁and ▁are ▁also ▁available ▁for ▁l ending ▁in ▁digital ▁form . ▁In ▁total , ▁the ▁Open ▁Library ▁offers ▁over ▁ 1 . 4 ▁million ▁books ▁for ▁digital ▁l ending . ▁ ▁Techn ical ▁Open ▁Library ▁began ▁in ▁ 2 0 0 6 ▁with ▁A aron ▁Sw art z ▁as ▁the ▁original ▁engineer ▁and ▁leader ▁of ▁the ▁Open ▁Library ' s ▁technical ▁team . ▁The ▁project ▁was ▁led ▁by ▁George ▁O ates ▁from ▁April ▁ 2 0 0 9 ▁to ▁December ▁ 2 0 1 1 . ▁O ates ▁was ▁responsible ▁for ▁a ▁complete ▁site ▁red es ign ▁during ▁her ▁ten ure . ▁In ▁ 2 0 1 5 , ▁the ▁project ▁was ▁continued ▁by ▁Giovanni ▁D ami ola ▁and ▁then ▁Br ent on ▁Ch eng ▁and ▁M ek ▁Kar p eles ▁in ▁ 2 0 1 6 . ▁ ▁The ▁site ▁was ▁red es igned ▁and ▁rela unch ed ▁in ▁May ▁ 2 0 1 0 . ▁Its ▁code base ▁is ▁on ▁GitHub . ▁The ▁site ▁uses ▁Inf ob ase , ▁its ▁own ▁database ▁framework ▁based ▁on ▁Post gre SQL , ▁and ▁Inf og