Reserves
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reserves</span>' is the definition.<br/ ><span class="explanation-format__explanation">(booking is a kind of reserving)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for books that I've seen before include "Tomes, volumes" , "Reserve tickets" , "Reserves" , "See 1" .)
(Another definition for nestegg that I've seen is " savings".)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reserves</span>' is the definition.<br/ ><span class="explanation-format__explanation">('set aside' can be a synonym of 'reserve')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Another definition for sets aside that I've seen is " Places in reserve for now, like asses diet".)