public async Task <List <List <Models.TbEbook> > > EbooksCliente(int idLogin)
        {
            int idCliente = loginDB.IdCliente(idLogin);
            List <List <Models.TbEbook> > ebooksFinal = new List <List <Models.TbEbook> >();

            Models.TbEstante estante = await ctx.TbEstante.FirstOrDefaultAsync(x => x.IdCliente == idCliente);

            List <Models.TbPrateleira> prateleiras = ctx.TbPrateleira.Where(x => x.IdEstante == estante.IdEstante).ToList();


            foreach (Models.TbPrateleira prateleira in prateleiras)
            {
                List <Models.TbEbook> ebooks = new List <Models.TbEbook>();

                List <Models.TbPrateleiraItem> prateleiraItems = ctx.TbPrateleiraItem.Where(x => x.IdPrateleira == prateleira.IdPrateleira)
                                                                 .ToList();

                foreach (Models.TbPrateleiraItem prateleiraItem in prateleiraItems)
                {
                    ebooks.Add(
                        await ctx.TbEbook.Include(x => x.IdAutorNavigation)
                        .FirstOrDefaultAsync(x => x.IdEbook == prateleiraItem.IdEbook)
                        );
                }

                ebooksFinal.Add(ebooks);
            }


            return(ebooksFinal);
        }