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In Deus Ex: Mankind Divided, there are a total of 75 eBooks that must be collected for this achievement. They are all technically missable since there is no mission select and you cannot free roam around Prague post-narrative. In addition to this, eBooks do not carry over into a NG+ playthrough.

You can keep track of your progress through the Database sub-menu by clicking the [ Register or Signin to view external links. ] button. When following the video guide below, PowerPyx recommends collecting the eBooks in the exact order shown without doing any unnecessary quests/exploration in between.

Lastly, you must have a few augmentations for this achievement, notably, and in the order they should be unlocked and fully upgraded: Hacking Capture (LV. 2, LV. 3, LV. 4, & LV. 5), Icarus Dash (Dorsal Propulsion Kit & Charged Dash), Cybernetic Arm Prosthesis (Optimized Musculature & Punch Through Wall), and Cybernetic Leg Prosthesis (Killspringer Jump Mod).

Thanks to PowerPyx, please see below for the full video guide and a list of important story choices and side missions that contain eBooks. If you fail a single one these requirements, you won't be able to get some eBooks (any side missions not listed here can be skipped):

Side Mission 02 "Cult of Personality" - You must play this mission during the first or second visit to Prague.
Main Mission 7 - Win the debate with Talos Rucker (Turn Tables, Patronize, Justify, Turn Tables)
Main Mission 10 - After Mission 10 you must decide whether to help Allison or take on the bank heist job. You have to play the bank heist (Mission 12) and skip helping Allison (skip Mission 11 completely). This is the only way to get the eBook in the bank vault. Allison's church complex will be open after completing Mission 12.
Side Mission 10 "The Harvester" - You must exonerate both suspects (Gunn & Radko) and do all of the optional objectives. Complete this before starting Mission 13.
Side Mission 11 "The Last Harvest" - This will trigger during Mission 14, provided you completed Side Mission 10 by exonerating both suspects. Two eBooks only show up while this mission is active.