I liked " Conception, Pregnancy and Birth" by Miriam Stoppard, found it very informative and practical.

I didnt really enjoy Kaz Cookes book but instead preferred another one of a similar vein called " A best Friends guide to Pregnancy" by Vicki Iovine, very funny and good to keep your spirits upa dn know you are not the only one experiencing things. Think with that one you might have to buy it online as not many bookshops stock it.