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Topics & Dewey Decimal System
Fiction & Biographies
Fiction books are arranged alphabetically by the author’s last name. The label shows the first seven letters of the author’s last name. Adult fiction is on the 28th Street side of the 2nd floor, next to the windows. Juvenile fiction is on the 1st floor behind the Children's Services desk. Young Adult (Teen) fiction is in the Teen Pit on the west side of the 2nd floor behind the glass wall.
Biographies are shelved by the last name of the person the book is about. The call number has a B for biography above the person’s last name and the name of the author of the book. Adult biographies are on the 28th Street side of the 2nd floor, next to the windows, back towards the northeast corner. Juvenile biographies are on the 1st floor north wall. Young Adult (Teen) bios are in the Teen Pit on the west side of the 2nd floor behind the glass wall.


The Dewey Decimal System numbers nonfiction materials by subject. The number on the book’s spine is that of the subject area above the first letters of the author’s last name. The numbers are the same for all items on the subject, whether they are adult, youth services, oversize, audiovisual, Reference or Montana Room materials.

Oversize Nonfiction
Oversize books are those that are too big to fit on regular shelves. They are shelved on the north wall of the 2nd floor, behind the other book shelves. Oversize books check out for the regular 28 day loan period. Call numbers for Oversize books are identical to those on the regular shelves. The label will have the letter "O" or the word “OVERSIZE” above the number and author’s name.

Reference & Montana Room
These items may be used in the Library building, but may not be checked out. This may be because they are rare, very expensive, in constant demand, or all of the above. The Montana Room is open during normal library hours & is located on the 2nd floor on the west side adjacent to the elevator. Reference books will have an R above the call number on the spine ["YR" in the Teen Pit and JR in Youth Services]. Montana Room materials will have either an M or MONTANA above the call number on the label. The adult reference collection is on the 2nd floor between Adult Fiction and adult non-fiction. For more information, ask one of the Library’s staff members for assistance.

Dewey Decimal System General Categories for Nonfiction
000 General
004-006 Computers & Programs
031-032 Encyclopedias
070 Journalism
100 Philosophy
130 Paranormal Phenomena
150 Psychology
180 Ancient Philosophy
190 Modern Philosophy

200 Religion

220 Bible
240 Inspirational Works
290 World Religions
292 Mythology

300 Social Sciences

301 Sociology
320 Politics & Government
330 Economics & Finance
340-360 Law & Crime
370 Education
398 Folklore

400 Language

420 English
430-480 European Languages
490 Other Languages

500 Science

510 Mathematics
520-550 Physical Sciences
560 Fossils & Dinosaurs
570-590 Life Sciences

600 Technology

610 Medicine & Health
620 Engineering & Transport
630 Gardening
636 Pets
641 Cooking
649 Parenting
650 Business

700 Arts

710 Landscape Design
720 Architecture
730-760 Art
770 Photography
780 Music
791 Entertainment
796 Sports

800 Literature

810 American Literature
820 English Literature
830-880 European Literature
890 World Literature

900 Geography & History

910 Travel
920 Genealogy
940 European History
950-960 Asian & African History
973 U.S. History
980-990 South American & Pacific History

Frequently Requested Topics
American History  973s
Art    700s
Autobiographies  B
Automotive Manuals 629.287
Baby Names  929.44
Biographies  B
Car Repair  629.287
Child Care  649
College Guides  378.73
Computers  004-005
Construction  690s
Cookbooks  641.5
Crafts  746
Decorating  747
Dieting  613.25
Dinosaurs  567.9
Encyclopedias  031-032
Fairy Tales  398.2
Finance  332
Foreign Languages  400s
Gardening  635
Genealogy  929.4
Health  610s
Home Business  658.041
Home Repair  643.7
Home Schooling  649.68
Humor  818
Interior Decorating 747
Internet  004.67
Investing  332
Montana History  978.6
Mythology  291-292
Native Americans  970.1-970.5
New Age  133s
Painting  751
Parenting  649
Pets    636
Plants    635
Plays    812 & 822
Poetry  811 & 821
Religion  200s
Remodeling  643.7
Resumes  650.14
Science Projects  507.2
Self-Help  158.1
Shakespeare  822.3
Travel Guides  910s
True Crime  364.1
Western History  978s
World War II  940.54