Overdue Book

Overdue books are a recurring item throughout the Commonwealth of Fallout 4. When a book is returned to one of the special terminals, the player receives five book return tokens. The tokens can then be exchanged for a variety of prizes. The most notable of them is a copy of the Massachusetts Surgical Journal from a terminal in Boston Public Library.

Book locations

 * ArcJet Systems one can be found during the quest Call to Arms on a large table in the meeting room located behind a closed door off the hallway where you encounter three ceiling turrets. A second can be found to the northwest in Bethany’s shack. (two total)
 * Back Street Apparel one can be found randomly at the top near the ladder to the Fens inside of a large toolbox.
 * Boston Mayoral Shelter one can be found in the kid’s room just east of the Mayor’s bedroom.
 * Boston Public Library three can be found in the mechanical room in the northeast corner of the library on the floor at the foot of two sleeping bags, a fourth is in the women’s restroom in a stall (respawns), a fifth is in the main reading room on a shelf, and a sixth is in the secondary reading room on a desk. Three more can be found in a Pulowski Preservation shelter to the southeast of the building’s exterior. (nine total)
 * Collegiate administration building two can be found at the front desk, a third is underneath the stairs next to a skeleton, and a fourth is on the floor of the second story by the hole covered with two planks. (four total)
 * Covenant one is in a toilet behind the house with Penny Fitzgerald’s store and Doctor Patricia’s clinic.
 * D.B. Technical High School one is on the ground floor between two damaged computers in the room with the overdue book return, a second is on the second floor on a short bookshelf near a large water lily painting in an area near a restroom above the cafeteria, the third is in the chemistry lab on the second floor under a picture of a farm, and the fourth is on the second floor on a table lit by a nearby steel drum fire. There is a fifth outside in front of the building in a Pulowski Preservation shelter. (five total)
 * East Boston Preparatory School one is in a locker in the hallway on the first floor, a second and third can be found in the toilet and urinal on the second floor, a fourth is on a student’s desk in the classroom next to the science lab on the second floor, a fourth and fifth are in the second floor music room on a student’s desk and a teacher’s desk, and a seventh is on a student’s desk in the adjacent classroom. According to the official guide, there are two more for a total of nine.
 * Faded Glory laundromat in Lexington, one is on the table at the northern entrance.
 * Faneuil Hall one can be found in the main hall on a chair against the north wall (appears east if entering while wearing power armor, which causes a bug with the compass).
 * Fort Hagen hangar one can be found in a medical room on a bed (first door on the right of the room with the tanks).
 * Goodneighbor one can be given to you by Daisy of Daisy's Discounts if you ask her for work and clear the super mutants in the Boston Public Library for her.
 * Greenetech Genetics one is on the fifth floor on a small table between two chairs before heading up to the sixth floor.
 * Hangman's Alley two can be found in the subway station to the west.
 * Harbormaster hotel one can be found in Room 61 on top of a seated skeleton’s lap.
 * Hoarder's apartment four can be found in the center of the room.
 * Kendall Hospital one is on a shelf by a hole in the wall to the northwest of the large fire, and a second is on the lower levels on a shelf in a room with a bed and two desks. (two total)
 * Lexington apartments one is on the top floor with two raiders.
 * Mass Fusion building one is on the seemingly unreachable section of the fourth floor and can be reached by dropping down from the floor above, and a second is on a desk on the reactor level.
 * Mass Pike Interchange one can be found in a trader's shack to the north.
 * Massachusetts State House one is leaning against the side of a desk with a terminal on it, in a room with a partially collapsed ceiling and a mattress west of the hall with two lion statues.
 * Merchants sometimes have them for sale.
 * Milton General Hospital one is on the ground floor on a small table near the reception desk.
 * Museum of Witchcraft one is on the ground next to a skeleton sitting at a school desk facing the corner.
 * Natick police department one is in an open cell, a second is in a trash can on the top floor of an office, and a third is in the windows of the book store just south of the police station. (three total)
 * Park Street station one is in the first room on the double bench on the far wall, opposite the entryway where the escalator out to the Commonwealth is.
 * Parkview Apartments one is on the first floor in a small bathroom under a skeleton inside of a bathtub.
 * Parsons State Insane Asylum one is inside a filing cabinet drawer on the west side of the first room you reach after taking the elevator down, the second is in the Control Room on top of a filing cabinet inside of a pulled out drawer (you must jump up or climb up onto a nearby structure to grab it), and a third is right next to the second in the filing cabinet directly to the right. (three total)
 * Plumber's Secret one can be found inside.
 * Public Works maintenance area during The Nuclear Option (Minutemen), one is in a school room.
 * Quincy police station one can be found in lockup in the basement on the floor of the middle cell. There is also a book return terminal on the first floor.
 * Ranger cabin one is in a trader's shack to the west. This one is marked as “owned” so you will have to “steal” it, angering Preston, Codsworth, and others.
 * Ruined church one is at the top of the tower beneath the hand of the skeleton.
 * Sandy Coves Convalescent Home one is in Margaret’s room (the room with potted plants) on top of the toilet, and three can be found in Edward’s room (the room with the typewriter) on the dresser, by the skeleton on the bed, and by the foot of the bed. (four total)
 * Saugus Ironworks one is in the southwest corner of the ground floor behind a skeleton inside a toppled smelting pot.
 * Shaw High School one is upstairs on a desk on the east side of the school, a second is upstairs on a desk on the west side, a third is on the floor near a locker near a mine, a fourth is on a toilet in the last stall of the bathroom next to the cafeteria, a fifth is in the main section of the library on an overturned bookcase to the left of the book return terminal, and three more are in the room where Unstoppables issue #1 is. (eight total)
 * Suffolk County charter school one is behind an expert locked door on the second floor (beware of a glowing radroach), a second is on the counter outside the principal’s office next to a broken terminal, a third is behind a large Novice locked door in the kitchen area, a fourth is on the floor of the library on the second floor next to a dead body in a pink dress, and a fifth is in the basement behind an Expert terminal-secured door. (five total)
 * The Dig one can be found during the quest The Big Dig. After you’ve sprung Mel out of jail and reconvened at the dig site, check the seats of the subway cars parked at the platform.
 * Ticker Tape Lounge one can be found behind the ramp next to a skeleton in a yellow dress.
 * Trinity Church one can be found down the stairs behind the lectern at the east end of the main chapel hall, a second is on the bottom floor on the table, a third is on a shelf of a bookcase on the west side of the bottom floor, and a fourth is on a table on the bottom floor. (four total)
 * Trinity Plaza three can found in the Pulowski Preservation shelters at the south end.
 * USAF Satellite Station Olivia one is resting on a cabinet in the middle of a small room across from a partially collapsed wall section of the larger two-story room with scaffolding, near the raider Ack-Ack.
 * Vim! Pop factory one is in Vim! Corporate Headquarters on the large table to the west in the room upstairs.
 * Walden Pond one is beneath the counter in the gift shop.
 * Waves Crest Orphanage one is under the bed upstairs.

Book return terminal locations

 * Boston Public Library
 * Suffolk County charter school
 * East Boston Preparatory School
 * Natick police department
 * Kendall Hospital
 * Shaw High School
 * Quincy police station
 * Sandy Coves Convalescent Home
 * D.B. Technical High School
 * A building next to Revere Beach station

Book return terminal prize list
This is a complete list of all prizes available from the book return terminals. Please note that the collectible baseball is not special in any way other than name, and Moe Cronin of Swatters has no interest in it.

It may be that there's a degree of randomness to the book return terminals as people have reported items listed that others have not.

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