The term photobook has only recently been used with regularity as a cataloging term. It can appear as a subject to describe photobooks as well as books about photobooks, but only in books that have been published or cataloged in the past ten years or so. Here are some other subject terms that are helpful in finding photobooks:
Artists' books
Photography, Artistic
Photobooks
Photobooks -- PLACE -- History
The VCUarts Qatar Curated Search returns results from all the physical book and media collections housed at the VCUarts Qatar Library as well as a curated selection of electronic items from the wider VCU Libraries collection. The curated collection focuses specifically on the information needs of VCUarts Qatar’s students and faculty. The VCUarts Qatar Curated search includes:
Many books relating to photography will have call numbers beginning with TR.
Subclass TR
TR1-1050 Photography
TR250-265 Cameras
TR287-500 Photographic processing. Darkroom technique
TR504-508 Transparencies. Diapositives
TR510-545 Color photography
TR550-581 Studio and laboratory
TR590-620 Lighting
TR624-835 Applied photography
TR845-899 Cinematography. Motion pictures TR925-1050 Photomechanical processes
Key subject terms to help you with locating photography books in black in white.
Black-and-white photography
Photographs: collections
Photography and photographs
PHOTOGRAPHY / Individual Photographers / Monographs
Photography, artistic
Monochrome
Photograms
Women photographers -- Arab countries
Photography -- COUNTRY
PHOTOGRAPHERS (similarly, see the following Animals as photographers; Architecture photographers; Automobile photographers; Blind photographers; Camera operators; Child photographers; Cinematographers; Daguerreotypists; Expatriate photographers; Food photographers; Gay photographers; Girl photographers; Indian photographers; Jewish photographers; Landscape photographers; Lesbian photographers; Painters as photographers; Paparazzi; Photogrammetrists; Photographers with visual disabilities; Photographic assistants; Photojournalists; Portrait photographers; Sports photographers; Teenage photographers; War photographers; Wildlife photographers; Women photographers; and, Young photographers
PHOTOGRAPHY (you will see many, many subheadings listed next to Photography (in alpha. order), e.g. Photography--19th Century..., Photography--United States. Same thing if you start with Photographic.
(related terms: Action photography; Aerial photography; Ambrotype; Applied photography; Architectural photography; Architecture and photography; Art and photography; Astronomical photography; Auroral photography; Available light photography; Black-and-white photography; Calendar art; Calotype; Chronophotography; Cinematography; Cinematography and photography; Classification—Books—Photography; Collotype; Color photography; Commercial photography; Composition (Photography); Daguerreotype; Depth of field (Photography); Documentary photography; Electrooptical photography; Electrophotography; Eye—Movements—Photographic measurements; Fascism and photography; Haiku in photography; Heliotype; Hemispherical photography; Hidden camera photography; Historiography and photography; Homeland in photography; Images, Photographic; Indoor photography; Infrared photography; Kirlian photography; Legal photography; Libraries—Special collections—Photography; Literature and photography; Microphotography; Museums and photography; Nature photography; Orthophotography; Outdoor photography; Photoceramics; Photogenic drawing; Photography, Tropical; Photomechanical processes; Photosculpture; Physautotype; Portrait photography; Repeat photography; Sequence photography; Spirit photography; Stage photography; Stereoscope; Telephotography; Time and photography; Tintype; Travel photography; Trick photography; Vernacular photography; Wide-angle photography; Zen photography; and Zoom lens photography)