This challenge is hosted by Sheila at Book Journey.

In February I’ve read books that take place in:

8 states:

Arizona
California
Connecticut
Illinois
Massachusetts
New York
North Carolina
Oregon

2 U.S. Territories:
Puerto Rico
Washington, D.C.

Countries:
England
Japan
Switzerland

3 Discworld and Fantasy Island

So overall that is:
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming

American Samoa
Guam
Northern Marianas Islands
Puerto Rico
Virgin Islands
Washington, D.C.

…. and 7 different foreign countries.