Suomen sammalseuran kustantama professori Risto Tuomikosken muistojulkaisu. Sisältää artikkelit: Timo Koponen: The biography of Professor Risto Tuomikoski, bryologist: entomologist, linguist, mycologist, vegetation scientist and ecologist, Rauno Ruuhijärvi: Risto Tuomikoski as a vegetation researcher and ecologist, Timo Koponen: Risto Tuomikoski as a bryologist, Veikko Hintikka: Risto Tuomikoski as a mycologist, Pekka Vilkamaa: Risto Tuomikoski as an entomologist, The Tuomikoski letters.