The full copies of these three books can be downloaded and saved
1886 Youngstown City Directory
https://archive.org/details/youngstownohioci00unse (https://archive.org/details/youngstownohioci00unse)
History of Youngstown And The Mahoning Valley – J. G. Butler
https://archive.org/details/historyyoungsto00butlgoog (https://archive.org/details/historyyoungsto00butlgoog)
20th Century History of Youngstown and Mahoning County Ohio - Sanderson
https://archive.org/details/20thcenturyhisto00sand (https://archive.org/details/20thcenturyhisto00sand)