If you have NEVER read a poker book at all I think you should start out with the Harrington series. They may be a bit dated but that's just because everyone read them.
Volume one is a super good place to start, then volume two, they are both required reading for anyone serious about poker IMO.
I have over 100 books/DVD's on poker FOR SURE and have read each one but if i had to lose the knowledge from the harrington series or EVERY OTHER BOOK COMBINED I thnk I would have to keep the Harrington stuff.
Its all basic now but if you have never read a poker book then you probably need to start with the great foundation HonHE laid.
Then I like Gus Hanson's Every hand revealed for hand examples in a more modern style
then, i would read THe Theory of Poker.
I think the theory of poker and HOHE one and two are mandatory for you to even understand what people are talking about on 2+2 half the time.
And Gus's book is just a fun read that shows how fundamentals are put into practice. Harringtons work book is OK too but its dated I think. Reading Harringtons work book wouldn't be a bad idea either, if for no other reason than to help you understand the thinking of the old school TAGs out there.
But, he gives examples of plays made by other players too, just interprated through him. The entire HOHE series is where its at but I wouldn't call them "page turners" whre Gus's book is super fun to read.