How to Save State Property

Help Morris (AKA clumsy guy) up when he trips (on your first day, when Hemnitz is showing you around). When you're leaving, Morris will stop you by the big screen and give you this book.
Alternatively, it'll be in the lost and found at the security checkpoint (RIP clumsy Morris).

Picking crossbar locks

2 hours

Popular tricks

Given by Peter Dong in the Robbery of the Century quest (as part of the quest series to help him get money for his mom - you need to make friends with him before you can get this quest).
Alternatively, buy it from Nikolai Page on the 12th floor.

Picking lever locks

6 hours

Universal advice

Found on the 12th floor; can be stolen from John Smith's desk, or obtained from the lost and found after he is eliminated.

Picking cylinder locks

6 hours

Management of Tenement Buildings

Found on floor 25, in the cart with papers.

Picking disk locks

6 hours

Fast Typing for Everyone

Found on floor 25; can be stolen from Stephen Dawking's desk, or obtained from the lost and found after he is eliminated.

Picking code locks

6 hours

Working with Terminals, vol. 1

Given by James Cunningham when he first visits you.

Hacking Patriot terminals

3 hours

Working with Terminals, vol. 2

Found on the tray with pastry (by the woman selling food) on the first floor.
Alternatively, given by Magda Rakovich at the start of one of the quests to help the orphanage (you can actually end up with both copies, although it won't have any special bonus).

Hacking Homeland terminals

5 hours

Working with Terminals, vol. 3

Found on floor 12, in the shelves near the door to De Salvo's office.

Hacking Hogweed terminals

5 hours

Working with Terminals, vol. 4

On floor 25, Oliver Vertinsky will give you this book if you show interest in his process.

Hacking Rocket terminals

3 hours

Working with Terminals, vol 5.

Found on floor 25; can be stolen from Horatio Newport's desk or found in lost and found after his elimination.

Hacking Exodus terminals

3 hours

Universal advice

Find out what's going on at window 101; when you come back to tell the visitor about it, he'll give you this book rather than take it home.

50% water supply discount

6 hours

Economic Theory and Life

Given during the quest to find quiz participants by the professor who is being arrested.

60% rent discount

10 hours

An Amateurs Electrician's Encyclopedia

When your landlord comes by to ask if you've seen the neighbor's cat, say no. The neighbor will stop by in a few days and give you this book.
(Thanks, Duke of Sussex and Seeker22!)

45% electricity discount

6 hours

The Effect of Magnetic Fields

Serena (the lady who sells stale buns) gives it to you after you destroy the vending machine for her if you don't ask her to help smuggle drugs.
(Thanks, Damien Ramsey! And thanks Seeker22 for clarifying on this and the other electricity book!)

45% electricity discount

6 hours

The World of Antennas. Size Doesn't Matter

During the "library raider" quest for DeSalvo, help the librarian search for the requested book. She will give you this book to thank you for your help.
(Thanks again, Duke of Sussex! And thanks to Seeker22 for adding the hilarious name of the book!)

50% TV bill discount

6 hours

Wilderness Survival

During Magda's mission to the port, enter the railroad shed and pick the lock (lockpicking level 2 skills are necessary). Upon leaving, you get the book.
(Thanks, bro44!)

50% food bill discount

6 hours

Learning South Borean, for Children

Found on floor 25, in Weinberg's office (in the stand in the middle of his office).

South Borean language

1 hour

The Canon of Clones

Found on floor 25, given by Weinberg after helping him with the Carl quest, or can be stolen from his desk.

Expert on the intricacies of Weinberg's religion

1 hour