Sentence:  This <WSD>is</WSD> not only a compliment to Mijbil , of whom there are a fine series of photographs and drawings in the book , but to the author who has catalogued the saga of a frightened otter cub 's journey by plane from Iraq to London , then by train ( where he lay curled in the wash basin playing with the water tap ) to Camusfearna , with affectionate detail . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)