If you collect Roman imperial coins you probably want RIC. I have good thick volumes for sale for less than the cost of photocopying them or printing out a pdf of them. See the clear 6" ruler at their base. These are good-sized books! RIC V, part II, Probus to Amandus, including the British Empire, Diocletian and Maximian (pre-reform) 1968 reprint, Spink and Sons. 3/4 by 6 1/2", 1 3/4" thick. 701 pages and XX plates. Well used but still well bound. [Part II is $250 on Amazon (too high!). $95 reduced to $85 here, reduced to $79, reduced to $69. Note: This is only part II of volume V.] RIC VI Diocletian to Maximinus (post reform) 9 3/4 by 6 1/2", 2 1/8" thick (That's a thick book). 727 pages and 16 plates. Good condition. No marks. Well used but still well bound. Minor stain on front cover. 1967 Spink and Son. [$89 on Amazon, $55 reduced to $45 here] See my site to see an image showing all the stains. http://augustusmath.hypermart.net/numislit.html RIC VII Constantine to Licinius, 9 3/4 by 6 1/2", 2 1/4" thick (That's a thick book.) 1966. Original printing. Well used but still well bound. Some stain on front cover, but not on pages, which are nice. Good condition. No marks. [$199 on Amazon. $74 reduced to $59 here], reduced to $55, reduced to $49.