Question: Who wrote the book which inspired the 1981 LGBT-related film directed by Hector Babenco ?

text: List of LGBT-related films of 1981
Films

This is a list of lesbian, gay, bisexual or transgender-related films released in 1981. It contains theatrically released films that deal with important gay, lesbian, bisexual, or transgender characters or issues and may have same-sex romance or relationships as a plot device.
Title Director Country Genre Cast Notes
Caligula et Messaline Bruno Mattei , Antonio Passalia , Jean-Jacques Renon France Italy Action Vladimir Brajovic , Betty Roland , Françoise Blanchard , Raul Cabrera , Gino Turini ( credited as John Turner ) , Angelo Arquilla , Piotr Stanislas , Vincent Lo Monaco , Fanny Magier , Laurence Lovall , Antonio Passalia ( credited as Anthony Pass ) , Dominique Irissou , Marie-Noëlle Arnoult , Silvie Dezabauneix and Kathy Sadik
Chanel Solitaire George Kaczender United Kingdom France Drama Marie-France Pisier , Timothy Dalton , Rutger Hauer Biographical film about Coco Chanel
Christiane F. - We Children from Bahnhof Zoo Uli Edel West Germany Biography , drama Natja Brunckhorst , Rainer Wölk , Jan Georg Effler , Christiane Reichelt , Daniela Jaeger , Kerstin Richter , David Bowie and Christiane Lechle Based on the autobiographical book Wir Kinder vom Bahnhof Zoo ( We Children from Bahnhof Zoo ) by Christiane F
Culo e camicia Pasquale Festa Campanile Italy Comedy Enrico Montesano , Daniela Poggi , Gianni Agus , Gino Pernice , Umberto Zuanelli , Ennio Antonelli , Renato Pozzetto , Leopoldo Mastelloni , Maria Rosaria Omaggio , Carlo Bagno and Carla Monti
End of the Fame Orhan Aksoy Turkey Drama , romance Bülent Bilgiç , Ekrem Bora , Bülent Ersoy , Semsi Inkaya , Yusuf Sezgin and Serpil Çakmakli a.k.a . Söhretin Sonu
Gay Club Ramón Fernández Spain Comedy Manuel Alexandre , Francisco Algora , Rafael Alonso , Amel Amor , Marciano Buendía , José María Caffarel , Fernando Calonje , José Manuel Cervino , Florinda Chico , Fernando Chinarro , José Luis Chinchilla , Luis Ciges , Rafael Conesa , Felix De Utrera and Paco España
Nessuno è perfetto Pasquale Festa Campanile Italy Comedy , drama , romance Renato Pozzetto , Ornella Muti , Lina Volonghi , Felice Andreasi , Massimo Boldi and Gabriele Tinti a.k.a . Nobody is perfect
Pixote Hector Babenco Brazil Action , crime , drama Fernando Ramos da Silva , Jorge Julião , Gilberto Moura , Edilson Lino , Zenildo Oliveira Santos , Claudio Bernardo , Israel Feres David , Jose Nilson Martin dos Stos , Marília Pêra , Jardel Filho , Rubens de Falco , Elke Maravilha , Tony Tornado , Beatriz Segall and João José Pompeo Based on the novel A Infância dos Mortos ( The Childhood of the Dead Ones ) by José Louzeiro
The Running Man Donald Brittain Canada Drama Chuck Shamata , Barbara Gordon , Colm Feore , Kate Trotter Episode of CBC Television anthology series For the Record
Taxi zum Klo Frank Ripploh West Germany Comedy Frank Ripploh , Bernd Broaderup , Orpha Termin , Peter Fahrni , Hans-Gerd Mehrtens , Dieter Godde , Klaus Schnee , Bernd Kroger , Markus Voigtlander , Irmgard Lademacher , Gregor Becker , Marguerite Dupont , Eberhard Freudenthal , Beate Springer , Millie Büttner , Gitta Lederer and Toller Cranston a.k.a . Taxi to the Toilet
El vicari d'Olot Ventura Pons Spain Drama Enric Majó , Enric Cusí , Maria Aurèlia Capmany , Marina Rossell , Núria Feliu , Carla Cristi , Marta May , Carmen Pérez ( as Carme Pérez ) , Jordi Brau , Rosa Morata , Montserrat Carulla , Carles Lloret , Fernando Guillén , Antonio Rovira ( as Antoni Rovira ) and Mary Santpere a.k.a . The Victor of Olot
Zorro , The Gay Blade Peter Medak United States Comedy George Hamilton , Lauren Hutton , Brenda Vaccaro , Ron Leibman , Donovan Scott , James Booth , Helen Burns , Clive Revill , Carolyn Seymour , Eduardo Noriega , Pilar Pellicer , Jorge Russek , Eduardo Alcaraz , Carlos Bravo y Fernández , Roberto Dumont , Jorge Bolio and Frank Welker