▁by ▁Manuel ▁T oh aria ▁and ▁subsequently ▁translated ▁into ▁Bulgar ian ▁language , ▁and ▁published ▁by ▁the ▁publish er ▁C iel a , ▁pre face ▁by ▁Christ o ▁P imp ire v . ▁ ▁Equ ally , ▁his ▁literary ▁activity ▁is ▁concentr ated ▁on ▁Ant ar ctic ▁them es . ▁Having ▁written ▁a ▁collection ▁of ▁Ant ar ctic ▁stories , ▁and ▁a ▁narr ative - f iction ▁book ▁” The ▁advent ures ▁of ▁P iti ▁in ▁the ▁Ant ar ctic ” ▁( 2 0 0 1 ▁Publications ▁T ao ) ▁and ▁subsequently ▁published ▁by ▁the ▁Sof ia ▁University . ▁His ▁last ▁books ▁are : ▁" Sh ack leton , ▁el ▁ind om able " ▁( Mad rid , ▁ 2 0 1 3 ), ▁" N ansen , ▁ma estro ▁de ▁la ▁expl ora ción ▁polar " ▁( Mad rid , ▁ 2 0 1 7 ) ▁and ▁" Y o , ▁el ▁F ram " ▁( Mad rid , ▁ 2 0 1 8 ). ▁Also ▁as ▁a ▁lect urer ▁he ▁has ▁concentr ated ▁on ▁the ▁Pol ar ▁subjects , ▁developing ▁an ▁inten se ▁activity ▁among ▁the ▁students . ▁ ▁Publications ▁ ▁Books ▁▁▁ ▁Ant ar ctic : ▁The ▁O zone ▁hole ▁( Mad rid , ▁ 1 9 8 9 ) ▁ ▁The ▁advent ures ▁of ▁P iti ▁in ▁the ▁Ant ar ctic ▁( Mad rid , ▁ 2 0 0 1 ) ▁ ▁The ▁advent ures ▁of ▁P iti ▁in ▁the ▁Ant ar ctic ▁( S of ia , ▁Bulg