, ▁but ▁he ▁has ▁returned ▁to ▁the ▁series ▁with ▁Never ▁Say ▁Die ▁( 2 0 1 7 ) ▁and ▁Night sh ade ▁( 2 0 2 0 ) ▁ ▁In ▁ 2 0 0 3 , ▁Hor ow itz ▁also ▁wrote ▁three ▁nov els ▁featuring ▁the ▁Diam ond ▁Brothers : ▁The ▁Bl ur red ▁Man , ▁The ▁French ▁Con fection ▁and ▁I ▁Know ▁What ▁You ▁Did ▁Last ▁Wed nes day , ▁which ▁were ▁repub lished ▁together ▁as ▁Three ▁of ▁Diam onds ▁in ▁ 2 0 0 4 . ▁The ▁author ▁information ▁page ▁in ▁early ▁ed itions ▁of ▁Sc orp ia ▁and ▁the ▁introduction ▁to ▁Three ▁of ▁Diam onds ▁claimed ▁that ▁Hor ow itz ▁had ▁travel led ▁to ▁Australia ▁to ▁research ▁a ▁new ▁Diam ond ▁Brothers ▁book , ▁entitled ▁Rad ius ▁of ▁the ▁Lost ▁Sh ark . ▁However , ▁this ▁book ▁has ▁not ▁been ▁mentioned ▁since , ▁so ▁it ▁is ▁doubt ful ▁it ▁is ▁still ▁planned . ▁A ▁new ▁Diam ond ▁Brothers ▁" short " ▁book ▁entitled ▁The ▁Greek ▁who ▁Sto le ▁Christmas ! ▁was ▁later ▁released . ▁It ▁is ▁hint ed ▁at ▁the ▁end ▁of ▁The ▁Greek ▁who ▁Sto le ▁Christmas ▁that ▁Rad ius ▁of ▁the ▁Lost ▁Sh ark ▁may ▁turn ▁out ▁to ▁be ▁the ▁e ighth ▁book ▁in ▁the ▁series . ▁Anthony ▁Hor ow itz ▁was ▁asked ▁in ▁ 2 0 1 2 ▁on ▁Twitter ▁by ▁a ▁fan ▁when ▁this ▁book ▁would ▁come ▁out , ▁to ▁which ▁Hor ow itz ▁replied ▁that ▁he ▁had ▁not ▁started ▁on ▁the ▁book ▁yet , ▁so