Couldnβt figure out how to get a picture into this post but I can recommend a great book called βThe Complete Guide to Runningβ - itβs Β£9.99 from WH Smithβs and full of facts, tips, etc plus some techie stuff for those who are serious runners!
Itβs one of those magazine/book hybrid so not too heavy (physically or readability!) but a great reference point.