BooksDB.cpp:148:10: error: could not convert ‘false’ from ‘bool’ to ‘…

[n-nino]

…shared_ptr’

Compiling BooksDB.o ...BooksDB.cpp: In member function ‘shared_ptr<Book> BooksDB::loadBook(const string&)’:
BooksDB.cpp:148:10: error: could not convert ‘false’ from ‘bool’ to ‘shared_ptr<Book>’
   return false;
          ^~~~~

$ gcc --version
gcc (GCC) 6.3.0
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.