Hit the books is another way to saying it is time to study.
VOA: special.2009.09.20
Listen as we play "Vendome",another big hit.
VOA: special.2009.03.01
Another expression involving hit is hit bottom.
VOA: special.2009.09.20
"I've always been a devotee of slapstick, and it sort of emphasizes sometimes jokes and you know I think everybody really deep inside would sometime or another would like to throw a pie or get hit with a pie."
VOA: special.2010.10.17
Just eight days after a massive earthquake crushed Haiti, another one hit, instilling fresh fears among Haitians still reeling from the first.
VOA: standard.2010.01.20
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