There are many books that are available for help with Linux.  Most people have their own favourites that they like to read.  Probably one of the best sources of books in the UK is Blackwells.  You might want to search their site ?  At least if you do wander over to their bookshop you can have a face to face chat with someone who may well show some sympathy with your new found obsession ?  You can also get some very good books from the Linux Emporium.  We have several book review pages.  You might want to look at some book reviews before you decide which one you should buy.