FantasticFiction     best place for series order for adults (and teens)

NPR Book Concierge     remade every year

Stop, You're Killing Me     all crime, but especially for cozy mysteries

Smart Bitches, Trashy Books     especially for romance

What Should I Read Next     book recommendations based on your favorite author or title

Poetry     for all things relating to poetry

Book Page     a great resource for all genres;  sign up for their email newsletters