The Owls of Bulgaria, ISBN 954-500-103-8
Waterbirds of Bourgas Wetlands, ISBN 954-9959-33-3
Atlas of the Breeding Birds in Bulgaria, BSPB, Conservation series, Book 10, ISBN 978-954-91421-7-4
Guide for the nature, ISBN 978-954-91790-3-3
Guide of animals and flowers included in Washington Convention — CITIES, ISBN 954-90820-8-3
Mammals of Rhodopi Mountains, ISBN 954-90601-3-6
Trees and Shrubs of National Park ‘Vitosha Mountain’
Drogflowers in Bulgaria, ISBN 954-642-117-0
Advances in Heteroptera Research, ISBN 978-954-642-311-5 (HB)
Red Data Book (insects, invertebrates, birds), in print
Spassov, N., Ignatov, A., Acosta-Pankov, I., 2016. On the status of the leopard in Turkey, again. — Cat news No 64, Autumn 2016, ISSN 1027-2992.
Spassov, N., Ignatov, A., Acosta-Pankov, I., 2015. The Story of the Turkish Dhole. Exploring and documenting diversity in nature. — CETAF Newsletter, October 2015.
Ignatov, A., Wetton, P., Beshkov, S., 2013. Chilades trochylus (Freyer, [1845]) (Lep.: Lycaenidae) confirmed for the Bulgaria fauna and doubt cast on earlier records of this and other species. — Entomologist’s Rec. J. Var., 125: 119—122. [PDF]
Spiridonov, J., Iankov, P., Georgiev, D., Nikolov, S., Delov, V., Barov, B., Ignatov, A., Nedialkov, R., Delchev, K., 2007. Pirin. — pp: 316—319, In: Kostadinova, I., Gramatikov, M. (eds) Important Bird Areas in Bulgaria and NATURA 2000. Bulgarian Society for the Protection of Birds, Sofia.
Simov, N., Ignatov, А., 2007. To recognize a wrabler and one poorly known ornitological theory. — For the birds, 2: 26. (in Bulgarian).
Ignatov, A., Spiridonov, G., Iankov, P., 2007. Long-eared Owl Asio otus. — pp: 334—335, In: Iankov, P. (ed.) Atlas of Breeding Birds in Bulgaria. Bulgarian Society for the Protection of Birds, Sofia.
Ignatov, A., Kantrandjiev, V., 2007. Great Spotted Cuckoo Glamator glandarius. — pp: 316—317, In: Iankov, P. (ed.) Atlas of Breeding Birds in Bulgaria. Bulgarian Society for the Protection of Birds, Sofia.
Ignatov, A., Iankov, P., Antonov, A., Kanchev, Ts., Spasova, V., 2007. Zlatiata. — pp: 146—148, In: Kostadinova, I., Gramatikov, M. (eds) Important Bird Areas in Bulgaria and NATURA 2000. Bulgarian Society for the Protection of Birds, Sofia.
Ignatov, A., Georgiev, D., 2007. Hen Harrier Circus cyaneus. — pp: 142—143, In: Iankov, P. (ed.) Atlas of Breeding Birds in Bulgaria. Bulgarian Society for the Protection of Birds, Sofia.
Ignatov, A., 2007. Red Kite Milvus milvus. — pp: 126—127, In: Iankov, P. (ed.) Atlas of Breeding Birds in Bulgaria. Bulgarian Society for the Protection of Birds, Sofia.