Histology for Pathologists is great. Also, Differential Diagnosis in Surgical Pathology is a good text for first-years to reference, however, you'll probably outgrow it quickly. It tells you basic stuff about basic stuff (i.e. what to look for in chronic gastritis) which may be useful to start off, but eventually you'll need a more advanced text. Personally, I am a fan of combining Sternberg with the Biopsy Interpretation Series books and other more specific texts, but you'll find what works for you.
In first-year, just focus on learning how to gross efficiently and learning basic normal histology and common disease processes.
Just a caveat to those who haven't started yet. Many programs have yearly book funds. I would wait to buy pathology books until you actually start residency, since the cost for many of them will be covered by your book fund.
My advice is to not study the summer before residency, and actually enjoy yourself..it's a long haul and you want to start fully charged up. If you're the type that has to do something, then review normal histology.
I usually recommend that junior residents starting out on surg path read up on how to gross colon, lung, breast, uterus and ovary specimens in either Lester or Hruban. But that doesn't really have to be done until the day you are actually faced with one of these and can whip out the dirty copy of the grossing manual, since it's hard to conceptualize until then anyway.