This site uses 56 photographs, all of them from Wikimedia Commons and all of them under licences that permit commercial use.
Where a licence requires attribution, the photographer is named below and beside the image itself. Every entry links back to the original file page, where the full licence terms and the photographer's own description can be read.
If you are one of the photographers listed here and something is wrong — a name, a licence, an image you would rather was not used — please get in touch and it will be corrected or removed the same day.
The book's own 34 figures, the cover, and the site's eight icons are original work by TJ Toce and are not listed here.
CC BY-SA 4.0
Attribution required. 20 images.
- A.BeneditoPsychotria viridis Ruiz & Pav
- Anthony BaratierAyahuasca Banisteriopsis caapi
- Anthony BaratierFeuilles de Psychotria viridis
- Bighouse2015Sonoran Desert Toad Bufo alvarius
- Carlo BresciaTroncos de cactus Echinopsis pachanoi
- CofreDeSofreSarpa salpa habitat
- Diego Delso, delso.photoSalemas (Sarpa salpa), Catania, Sicilia, Italia, 2025-04-04, DD 62
- Diego Delso, delso.photoSalema (Sarpa salpa), Catania, Sicilia, Italia, 2025-04-04, DD 90
- Diego Delso, delso.photoGrupo de salemas (Sarpa salpa), Parque natural de la Arrábida, Portugal, 2020-07-23, DD 28
- Jaime Torres / Archivo Centro TakiwasiRecolectando hojas de chacruna (Psychotria viridis) para brebaje ayahuasca
- KandelrashmiHoney hunting by Gurung Tribesman
- Martijn KlijnstraSarpa salpa; Goldline (cropped)
- Martín HuamánCactus San Pedro cortado y sin espinas (preparaciòn de baño) en Takiwasi
- MycellenzGymnopilus purpuratus stems
- MycellenzPsilocybe angulospora nz 2020
- Prof.lumacornoSalema porgy as food 002
- Scienceman71Spiss fleinsopp 1
- Touring Club ItalianoPhoto Dreamfishes 1959 - Touring Club Italiano 2.2066
- Touring Club ItalianoPhoto Dreamfishes 1960 - Touring Club Italiano 2.2067
- Author not stated on CommonsSobo 1909 624 ar
CC BY-SA 3.0
Attribution required. 10 images.
- CactuPan.cyanescens
- Dav HirLophophora williamsii Blüte
- DrOONeilFMRI Brain Scan
- Frank VincentzLophophora williamsii ies
- RasbakPontische rododendron struik (Rhododendron ponticum)
- Sudan ShresthaVhir Mauri (1)
- Sudan ShresthaVhir Mauri (2)
- Ulf EliassonRhododendron anthopogon subsp. hypenanthum 'Annapurna'
- Author not stated on CommonsPanaeolus-cyanescens-y-axis-flipped
- Author not stated on CommonsBufo alvarius Ohrdrüsen
CC BY-SA 2.0
Attribution required. 4 images.
- Anders Finn JørgensenSalpa shoal near Stomorska
- Charlie LlewellinAlexander Shulgin cropped
- Jorge PachecoFlor de Cactus San Pedro (16325278747)
- Paolo GambaSarpa salpa (48842963322)
CC BY 4.0
Attribution required. 1 image.
- Alex AbairPsilocybe cubensis 82779929
CC BY 3.0
Attribution required. 4 images.
- Forest & Kim StarrStarr 070320-5799 Echinopsis pachanoi
- Forest and Kim StarrStarr-140222-0331-Banisteriopsis caapi-leaves-Haiku-Maui (25147314901)
- Holger KrispFliegenpilz fly agaric Amanita muscaria
- Holger KrispBufo-alvarius-front
CC BY 2.0
Attribution required. 6 images.
- Amante DarmaninLophophora williamsii (5676371362)
- ApolloAyahuasca Vine 25
- Buffon, Cuvier, ValenciennesHistoire naturelle des poissons (10438519516)
- Dominic Milton TrottMad Honey
- schizoformEchinopsis-peruviana
- The Drug Users BibleMDMA Pills
Public domain
No attribution required. Listed for the record. 11 images.
- Benjah-bmm27MDMA-3D
- C.W. LeadbeaterPineal Gland and Pituitary Body
- J. Forbes RoyleIllustrations of the botany and other branches of the natural history of the Himalayan Mountains (Pl. 64) (6982084552)
- Leonardo da VinciDa Vinci Vitruve Luc Viatour
- Multidisciplinary Association for Psychedelic StudiesLSD-clinical-trial-bottle
- National Cancer InstituteBrain
- U.S. Food and Drug AdministrationGeneric Drug Research (5896) (8493711422)
- William RaftiKK242 Vs Standard Peruvian Torch
- Author not stated on Commons2008-01-31 Psilocybe cubensis crop
- Author not stated on CommonsPsilocybe Mushrooms statues
- Author not stated on CommonsBufo alvarius1